/* ============================================================
   MyBuddy 官网 · 共享样式
   来源：docs/ui-prototype-website.html（已剥离原型工具条与深浅色切换）
   ============================================================ */
:root{
  --brand:#0f9d8f; --brand-hover:#0c8075; --brand-soft:rgba(15,157,143,.08);
  --brand-ink:#0b7c72;
  --ok:#16a34a; --ok-soft:rgba(22,163,74,.1);
  --info:#2563eb; --info-soft:rgba(37,99,235,.08);
  --bg:#f7f9fa; --surface:#ffffff; --surface-2:#f2f5f6;
  --border:#e6eaee; --border-2:#d9e0e5;
  --text:#161b20; --text-2:#5b6770; --text-3:#98a2ab;
  --shadow-sm:0 1px 2px rgba(16,24,32,.05),0 1px 3px rgba(16,24,32,.06);
  --shadow-md:0 6px 20px rgba(16,24,32,.08),0 2px 6px rgba(16,24,32,.05);
  --shadow-lg:0 18px 48px rgba(16,24,32,.14);
  --radius:14px; --radius-sm:9px;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg); color:var(--text); font-size:14px; line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
.mono{font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
.ic{width:18px;height:18px;flex:none}

/* ===== 官网顶栏 ===== */
.nav{
  position:sticky; top:0; z-index:100; display:flex; align-items:center; gap:32px;
  padding:14px 40px; background:rgba(255,255,255,.82);
  backdrop-filter:blur(12px); border-bottom:1px solid var(--border);
}
.nav .logo{display:flex;align-items:center;gap:9px;font-weight:700;font-size:16px}
.nav .logo .mark{width:26px;height:26px;border-radius:7px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800}
.nav .links{display:flex;gap:24px;font-size:14px}
.nav .links a{color:var(--text-2);transition:color .15s}
.nav .links a:hover{color:var(--text)}
.nav .links a.active{color:var(--text);font-weight:600}
.nav .right{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav .dl-btn{background:var(--brand);color:#fff;border:none;padding:8px 16px;border-radius:8px;font-size:13.5px;font-weight:600;display:flex;align-items:center;gap:7px}
.nav .dl-btn:hover{background:var(--brand-hover)}

.wrap{max-width:1080px;margin:0 auto;padding:0 32px}

/* ===== Hero ===== */
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;padding:64px 0 56px}
.hero .badge{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;color:var(--brand-ink);background:var(--brand-soft);border:1px solid var(--border);border-radius:20px;padding:4px 12px;font-weight:600;margin-bottom:20px}
.hero h1{font-size:44px;line-height:1.2;font-weight:800;letter-spacing:-.5px}
.hero h1 .hl{color:var(--brand-ink)}
.hero .sub{margin-top:18px;font-size:16px;color:var(--text-2);max-width:480px}
.hero .cta{display:flex;gap:12px;margin-top:30px;align-items:center;flex-wrap:wrap}
.cta-primary{background:var(--brand);color:#fff;border:none;padding:12px 22px;border-radius:10px;font-size:15px;font-weight:600;display:flex;align-items:center;gap:9px}
.cta-primary:hover{background:var(--brand-hover)}
.cta-secondary{background:var(--surface);color:var(--text);border:1px solid var(--border-2);padding:12px 22px;border-radius:10px;font-size:15px;font-weight:600;display:flex;align-items:center;gap:9px}
.cta-secondary:hover{border-color:var(--brand)}
.hero .ver{margin-top:16px;font-size:12.5px;color:var(--text-3)}
.hero .ver a{color:var(--brand-ink)}

/* 产品窗口示意 */
.hero-shot{position:relative}
.win{background:var(--surface);border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow-lg);overflow:hidden}
.win-bar{display:flex;align-items:center;gap:6px;padding:11px 14px;border-bottom:1px solid var(--border)}
.win-bar i{width:11px;height:11px;border-radius:50%}
.win-bar .r{background:#ff5f57}.win-bar .y{background:#febc2e}.win-bar .g{background:#28c840}
.win-bar .t{margin-left:12px;font-size:12px;color:var(--text-3)}
.win-body{display:flex;height:340px}
.win-side{width:150px;border-right:1px solid var(--border);padding:12px 8px;display:flex;flex-direction:column;gap:3px}
.win-side .s{display:flex;align-items:center;gap:8px;padding:7px 10px;border-radius:7px;font-size:12px;color:var(--text-2)}
.win-side .s.on{background:var(--brand-soft);color:var(--brand-ink);font-weight:600}
.win-side .s .ic{width:14px;height:14px}
.win-main{flex:1;display:flex;flex-direction:column;padding:18px}
.win-main .bubble{background:var(--brand-soft);color:var(--brand-ink);border-radius:12px;padding:12px 14px;font-size:13px;max-width:82%;align-self:flex-start}
.win-main .bubble.user{background:var(--surface-2);color:var(--text);align-self:flex-end;margin-top:10px}
.win-input{margin-top:auto;border:1px solid var(--border-2);border-radius:10px;padding:11px 14px;font-size:13px;color:var(--text-3);display:flex;align-items:center;justify-content:space-between}
.float-chip{position:absolute;right:-14px;bottom:24px;background:var(--surface);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow-md);padding:10px 14px;display:flex;align-items:center;gap:9px;font-size:12.5px;font-weight:600}
.float-chip .ic{color:var(--brand-ink)}

/* ===== 特性 ===== */
.section{padding:48px 0}
.sec-title{text-align:center;margin-bottom:40px}
.sec-title h2{font-size:28px;font-weight:800;letter-spacing:-.3px}
.sec-title p{margin-top:10px;font-size:15px;color:var(--text-2)}
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feature{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:transform .15s,box-shadow .15s}
.feature:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.feature .fi{width:42px;height:42px;border-radius:11px;background:var(--brand-soft);color:var(--brand-ink);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.feature h3{font-size:16px;font-weight:700;margin-bottom:7px}
.feature p{font-size:13.5px;color:var(--text-2)}

/* ===== 多端 ===== */
.platforms{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.platform{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;text-align:center}
.platform .pi{width:46px;height:46px;border-radius:12px;background:var(--surface-2);color:var(--text-2);display:flex;align-items:center;justify-content:center;margin:0 auto 14px}
.platform h3{font-size:15px;font-weight:700;margin-bottom:5px}
.platform p{font-size:12.5px;color:var(--text-3)}
.platform .tag{display:inline-block;margin-top:10px;font-size:11px;font-weight:700;color:var(--brand-ink);background:var(--brand-soft);padding:2px 10px;border-radius:20px}

/* ===== 底部 CTA ===== */
.cta-band{background:linear-gradient(180deg,var(--brand-soft),transparent);border:1px solid var(--border);border-radius:18px;padding:48px 32px;text-align:center}
.cta-band h2{font-size:26px;font-weight:800}
.cta-band p{margin-top:10px;font-size:14.5px;color:var(--text-2)}
.cta-band .cta{justify-content:center;margin-top:24px}

/* ===== 页脚 ===== */
.footer{border-top:1px solid var(--border);margin-top:56px;padding:32px 0}
.footer .inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px}
.footer .brand{display:flex;align-items:center;gap:8px;font-weight:700}
.footer .brand .mark{width:20px;height:20px;border-radius:6px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:800}
.footer .flinks{display:flex;gap:22px;font-size:13px;color:var(--text-2)}
.footer .flinks a:hover{color:var(--text)}
.footer .copy{font-size:12.5px;color:var(--text-3)}

/* ===== 通用页头（下载页 / 文档页） ===== */
.page-hero{text-align:center;padding:52px 0 36px}
.page-hero h1{font-size:34px;font-weight:800;letter-spacing:-.4px}
.page-hero p{margin-top:12px;font-size:15px;color:var(--text-2)}

/* ===== 下载页 ===== */
.seg{display:inline-flex;margin-top:28px;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:4px}
.seg button{border:none;background:transparent;padding:9px 22px;border-radius:8px;font-size:14px;font-weight:600;color:var(--text-2);display:flex;align-items:center;gap:8px}
.seg button.active{background:var(--surface);color:var(--text);box-shadow:var(--shadow-sm)}
.seg .ic{width:16px;height:16px}

.dl-panel{display:grid;grid-template-columns:1.4fr .9fr;gap:20px;margin-bottom:36px}
.dl-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm)}
.dl-card .head{display:flex;align-items:center;gap:14px;margin-bottom:20px}
.dl-card .os-ic{width:52px;height:52px;border-radius:13px;background:var(--brand-soft);color:var(--brand-ink);display:flex;align-items:center;justify-content:center}
.dl-card .os-ic .ic{width:26px;height:26px}
.dl-card h3{font-size:19px;font-weight:800}
.dl-card .os-sub{font-size:12.5px;color:var(--text-3)}
.dl-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:22px}
.dl-meta .m{background:var(--surface-2);border-radius:10px;padding:12px 14px}
.dl-meta .m .k{font-size:11px;color:var(--text-3);margin-bottom:3px}
.dl-meta .m .v{font-size:14px;font-weight:700}
.dl-big{width:100%;background:var(--brand);color:#fff;border:none;padding:14px;border-radius:11px;font-size:16px;font-weight:700;display:flex;align-items:center;justify-content:center;gap:9px}
.dl-big:hover{background:var(--brand-hover)}
.dl-big:disabled{opacity:.6;cursor:not-allowed}
.sha{margin-top:18px;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:11px 14px;display:flex;align-items:center;gap:10px;font-size:12px}
.sha .code{flex:1;color:var(--text-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sha button{border:none;background:transparent;color:var(--text-3);display:flex;align-items:center;gap:5px;font-size:12px;padding:3px 6px;border-radius:6px}
.sha button:hover{color:var(--brand-ink);background:var(--brand-soft)}

.dl-side{display:flex;flex-direction:column;gap:16px}
.dl-card.small{padding:20px}
.dl-card.small h4{font-size:14px;font-weight:700;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.req-list{list-style:none;font-size:13px;color:var(--text-2)}
.req-list li{display:flex;gap:9px;padding:5px 0}
.req-list .ic{width:15px;height:15px;color:var(--brand-ink);margin-top:2px}
.steps{counter-reset:s;list-style:none}
.steps li{display:flex;gap:13px;padding:9px 0}
.steps .n{width:24px;height:24px;border-radius:50%;background:var(--brand);color:#fff;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;flex:none}
.steps .b{font-size:13.5px}
.steps .b small{display:block;color:var(--text-3);font-size:12px}

.changelog{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:40px}
.changelog h4{font-size:14px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.changelog .ver-tag{font-size:11px;font-weight:700;background:var(--brand-soft);color:var(--brand-ink);padding:2px 9px;border-radius:20px;margin-right:8px}
.changelog ul{list-style:none;font-size:13.5px;color:var(--text-2)}
.changelog li{padding:5px 0 5px 20px;position:relative}
.changelog li::before{content:"";position:absolute;left:6px;top:13px;width:6px;height:6px;border-radius:50%;background:var(--brand)}

/* ===== 文档页 ===== */
.docs-layout{display:grid;grid-template-columns:220px 1fr;gap:32px;padding:32px 0 56px;align-items:start}
.docs-side{position:sticky;top:76px;display:flex;flex-direction:column;gap:4px}
.docs-side .d-title{font-size:12px;font-weight:700;color:var(--text-3);margin-bottom:8px;padding:0 12px;letter-spacing:.5px}
.docs-side a{padding:8px 12px;border-radius:8px;font-size:13.5px;color:var(--text-2);display:flex;align-items:center;gap:8px}
.docs-side a:hover{color:var(--text);background:var(--surface-2)}
.docs-side a.active{color:var(--brand-ink);background:var(--brand-soft);font-weight:600}
.docs-side a .ic{width:15px;height:15px}
.docs-content{display:flex;flex-direction:column;gap:24px;min-width:0}
.doc-section{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;scroll-margin-top:80px}
.doc-section h2{font-size:22px;font-weight:800;margin-bottom:6px;display:flex;align-items:center;gap:10px}
.doc-section h2 .ic{width:20px;height:20px;color:var(--brand-ink)}
.doc-section .doc-sub{font-size:13.5px;color:var(--text-3);margin-bottom:20px}
.doc-section h3{font-size:15px;font-weight:700;margin:22px 0 8px}
.doc-section p{font-size:14px;color:var(--text-2);line-height:1.7}
.doc-section ul,.doc-section ol{margin:8px 0 8px 20px;font-size:14px;color:var(--text-2);line-height:1.7}
.doc-section li{margin:6px 0}
.doc-section code{font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace;background:var(--surface-2);border:1px solid var(--border);border-radius:6px;padding:2px 6px;font-size:13px;color:var(--brand-ink)}
.doc-section pre{background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:16px;overflow-x:auto;font-size:13px;line-height:1.6;margin:12px 0}
.doc-section pre code{background:none;border:none;padding:0;color:var(--text)}
.faq-item{border:1px solid var(--border);border-radius:10px;padding:16px 18px;margin-top:12px}
.faq-item .q{font-weight:700;font-size:14px;display:flex;gap:10px;align-items:flex-start}
.faq-item .q .ic{width:16px;height:16px;color:var(--brand-ink);margin-top:2px;flex:none}
.faq-item .a{font-size:13.5px;color:var(--text-2);margin-top:8px;padding-left:26px;line-height:1.7}

/* ===== Toast ===== */
.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(10px);background:var(--text);color:var(--surface);padding:10px 18px;border-radius:10px;font-size:13px;box-shadow:var(--shadow-md);opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:300}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

@media(max-width:900px){
  .hero{grid-template-columns:1fr}
  .features,.platforms{grid-template-columns:1fr}
  .dl-panel{grid-template-columns:1fr}
  .nav .links{display:none}
  .hero h1{font-size:34px}
  .docs-layout{grid-template-columns:1fr}
  .docs-side{position:static;flex-direction:row;flex-wrap:wrap}
}