/* ==========================================================
   Open-Shell-Menu 官方网站 样式表
   配色取自软件 Logo：贝壳蓝 #3BC6F0 / 珊瑚橙 #DE9464
   风格：扁平 · 现代 · 专业
   ========================================================== */

:root{
  --blue:#1FA9E0;
  --blue-dark:#1289C4;
  --blue-deep:#0B6E9E;
  --cyan:#3BC6F0;
  --cyan-light:#8FE0FA;
  --orange:#F08C3C;
  --orange-dark:#DE7A28;
  --orange-soft:#FDEBDB;
  --navy:#0F2B3D;
  --navy-2:#16405A;
  --ink:#1E3A4A;
  --gray:#55707E;
  --gray-light:#8AA2AE;
  --line:#E1EDF4;
  --bg:#FFFFFF;
  --bg-soft:#F4FAFD;
  --bg-blue:#EAF6FD;
  --radius:14px;
  --radius-sm:9px;
  --shadow:0 2px 10px rgba(15,43,61,.05);
  --shadow-md:0 8px 28px rgba(15,43,61,.09);
  --max:1180px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"Segoe UI","Microsoft YaHei","PingFang SC","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.75;
  font-size:16.5px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;vertical-align:middle}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--blue-dark)}
h1,h2,h3,h4{color:var(--navy);line-height:1.35;font-weight:700}
ul,ol{padding-left:1.25em}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section--soft{background:var(--bg-soft)}
.section--blue{background:var(--bg-blue)}

/* ---------- 通用标题 ---------- */
.sec-head{text-align:center;max-width:760px;margin:0 auto 56px}
.sec-tag{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;
  color:var(--blue);background:var(--bg-blue);border:1px solid #CBE9F8;
  padding:5px 16px;border-radius:999px;margin-bottom:16px;text-transform:uppercase;
}
.sec-tag--orange{color:var(--orange-dark);background:var(--orange-soft);border-color:#F7D9BE}
.sec-head h2{font-size:34px;margin-bottom:14px}
.sec-head p{color:var(--gray);font-size:17.5px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  font-size:16.5px;font-weight:600;line-height:1;
  padding:15px 32px;border-radius:10px;border:2px solid transparent;
  cursor:pointer;transition:background .18s ease,border-color .18s ease,color .18s ease,transform .18s ease;
  font-family:inherit;
}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--orange);color:#fff}
.btn--primary:hover{background:var(--orange-dark);color:#fff}
.btn--blue{background:var(--blue);color:#fff}
.btn--blue:hover{background:var(--blue-dark);color:#fff}
.btn--outline{border-color:var(--blue);color:var(--blue);background:transparent}
.btn--outline:hover{background:var(--blue);color:#fff}
.btn--ghost-w{border-color:rgba(255,255,255,.55);color:#fff;background:transparent}
.btn--ghost-w:hover{background:rgba(255,255,255,.14);color:#fff}
.btn--lg{padding:18px 42px;font-size:18px;border-radius:12px}
.btn svg{flex:none}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:900;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(1.2) blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-bar{display:flex;align-items:center;gap:36px;height:72px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand img{width:40px;height:40px}
.brand-name{font-size:20px;font-weight:800;color:var(--navy);letter-spacing:.2px;white-space:nowrap}
.brand-name em{font-style:normal;color:var(--blue)}
.nav-links{display:flex;gap:6px;list-style:none;padding:0;margin:0 auto}
.nav-links a{
  display:block;padding:9px 16px;border-radius:8px;
  color:var(--ink);font-size:15.5px;font-weight:600;
}
.nav-links a:hover{background:var(--bg-blue);color:var(--blue-dark)}
.nav-links a.active{color:var(--blue-dark);background:var(--bg-blue)}
.nav-cta{flex:none}
.nav-cta .btn{padding:11px 24px;font-size:15px}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:10px;background:transparent;border:1px solid var(--line);
  border-radius:8px;cursor:pointer;
}
.nav-toggle span{display:block;height:2.5px;background:var(--navy);border-radius:2px}

/* ---------- 首屏 Hero ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#F0FAFF 0%,#FFFFFF 88%)}
.hero::before{
  content:"";position:absolute;top:-180px;right:-160px;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,rgba(59,198,240,.16),rgba(59,198,240,0) 68%);
}
.hero::after{
  content:"";position:absolute;bottom:-240px;left:-180px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(240,140,60,.12),rgba(240,140,60,0) 68%);
}
.hero-inner{
  position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;
  gap:64px;align-items:center;padding:96px 0 104px;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:7px 16px 7px 10px;font-size:13.5px;font-weight:600;color:var(--gray);
  box-shadow:var(--shadow);margin-bottom:22px;
}
.hero-badge b{color:var(--orange-dark)}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:#2ECC71;margin-left:4px}
.hero h1{font-size:50px;letter-spacing:-.5px;margin-bottom:22px}
.hero h1 .hl-blue{color:var(--blue)}
.hero h1 .hl-orange{color:var(--orange)}
.hero-lead{font-size:18.5px;color:var(--gray);max-width:560px;margin-bottom:34px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:40px}
.hero-facts{display:flex;gap:36px;flex-wrap:wrap}
.hero-facts .fact b{display:block;font-size:26px;color:var(--navy);font-weight:800}
.hero-facts .fact span{font-size:13.5px;color:var(--gray-light)}

/* ---------- Hero 右侧：CSS 绘制的经典开始菜单示意图 ---------- */
.demo{position:relative}
.demo-desktop{
  background:linear-gradient(160deg,#2C9FD6 0%,#1B7FB0 60%,#146A94 100%);
  border-radius:18px;padding:26px 22px 0;box-shadow:var(--shadow-md);
  border:1px solid rgba(255,255,255,.5);
}
.demo-screen{
  background:#F7FBFE;border-radius:10px 10px 0 0;overflow:hidden;
  border:1px solid rgba(15,43,61,.08);border-bottom:none;
}
.demo-titlebar{
  height:34px;background:#fff;border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:8px;padding:0 12px;
}
.demo-titlebar i{width:11px;height:11px;border-radius:50%;display:block}
.demo-titlebar i:nth-child(1){background:#FF6159}
.demo-titlebar i:nth-child(2){background:#FFBD2E}
.demo-titlebar i:nth-child(3){background:#28C840}
.demo-body{position:relative;padding:26px;min-height:330px}
/* 经典双栏菜单 */
.demo-menu{
  position:absolute;left:22px;bottom:56px;width:380px;max-width:88%;
  background:#fff;border:1px solid #D6E6EF;border-radius:10px 10px 6px 6px;
  box-shadow:0 14px 40px rgba(15,43,61,.18);overflow:hidden;
}
.demo-menu-search{
  display:flex;align-items:center;gap:8px;background:var(--bg-blue);
  border-bottom:1px solid var(--line);padding:10px 14px;
  font-size:12.5px;color:var(--gray-light);
}
.demo-menu-search::before{content:"";width:12px;height:12px;border:2px solid var(--gray-light);border-radius:50%;flex:none}
.demo-menu-cols{display:grid;grid-template-columns:1.25fr 1fr}
.demo-col{padding:10px 8px}
.demo-col + .demo-col{background:#F2F9FD;border-left:1px solid var(--line)}
.demo-item{
  display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:6px;
  font-size:13px;color:var(--ink);font-weight:600;
}
.demo-item span.ic{
  width:22px;height:22px;border-radius:5px;flex:none;
  background:linear-gradient(135deg,var(--cyan),var(--blue));
}
.demo-item:nth-child(2) span.ic{background:linear-gradient(135deg,#F6B73C,var(--orange))}
.demo-item:nth-child(3) span.ic{background:linear-gradient(135deg,#5AD19A,#27AE60)}
.demo-item:nth-child(4) span.ic{background:linear-gradient(135deg,#9B8CF2,#6C5CE7)}
.demo-item:nth-child(5) span.ic{background:linear-gradient(135deg,#F28CB1,#E0457B)}
.demo-item.is-hot{background:var(--bg-blue)}
.demo-item small{margin-left:auto;font-weight:400;color:var(--gray-light);font-size:11px}
.demo-user{
  display:flex;align-items:center;gap:10px;background:var(--navy);
  padding:10px 14px;color:#D7ECF7;font-size:12.5px;font-weight:600;
}
.demo-user i{width:24px;height:24px;border-radius:50%;background:linear-gradient(135deg,var(--orange),#F6B73C);flex:none;display:block}
.demo-user b{margin-left:auto;font-weight:600;font-size:11.5px;color:#9FC6DA}
/* 任务栏 */
.demo-taskbar{
  position:absolute;left:0;right:0;bottom:0;height:44px;
  background:var(--navy);display:flex;align-items:center;gap:10px;padding:0 14px;
}
.demo-start{
  display:flex;align-items:center;gap:8px;background:var(--orange);
  color:#fff;font-size:12.5px;font-weight:700;padding:7px 14px;border-radius:7px;
}
.demo-start img{width:16px;height:16px}
.demo-task{width:34px;height:26px;border-radius:6px;background:rgba(255,255,255,.12)}
.demo-clock{margin-left:auto;color:#BFDCEC;font-size:11.5px}
.demo-caption{
  text-align:center;font-size:13.5px;color:var(--gray-light);padding:14px 0 18px;
}
.demo-note{
  position:absolute;top:6px;right:-8px;z-index:3;
  background:#fff;border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow-md);padding:12px 18px;font-size:13px;font-weight:700;color:var(--navy);
  display:flex;align-items:center;gap:9px;
}
.demo-note img{width:26px;height:26px}
.demo-note small{display:block;font-weight:500;color:var(--gray-light);font-size:11.5px}

/* ---------- 特性卡片 ---------- */
.grid{display:grid;gap:26px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:32px 28px;transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.card:hover{border-color:var(--cyan);box-shadow:var(--shadow-md);transform:translateY(-4px)}
.card-icon{
  width:54px;height:54px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:var(--bg-blue);margin-bottom:20px;
}
.card-icon svg{width:27px;height:27px}
.card-icon--orange{background:var(--orange-soft)}
.card h3{font-size:19px;margin-bottom:10px}
.card p{font-size:15px;color:var(--gray)}

/* ---------- 数字带 ---------- */
.stats{background:var(--navy);color:#fff;padding:70px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center}
.stat b{display:block;font-size:42px;font-weight:800;color:var(--cyan);letter-spacing:-.5px}
.stat > span{font-size:14.5px;color:#9FC6DA}

/* ---------- 三种菜单样式 ---------- */
.styles-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.style-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.style-card:hover{border-color:var(--cyan);box-shadow:var(--shadow-md);transform:translateY(-4px)}
.style-preview{height:190px;display:flex;align-items:flex-end;justify-content:center;padding:22px 22px 0}
.style-preview--a{background:linear-gradient(160deg,#EAF6FD,#D8EEF9)}
.style-preview--b{background:linear-gradient(160deg,#FDF2E7,#FBE3CC)}
.style-preview--c{background:linear-gradient(160deg,#EEF4F8,#DCE8F0)}
.sk{background:#fff;border:1px solid #D6E6EF;box-shadow:0 8px 22px rgba(15,43,61,.10);font-size:10.5px;color:var(--ink)}
.sk-head{background:var(--blue);color:#fff;font-weight:700;padding:6px 10px;font-size:10px;border-radius:6px 6px 0 0}
.sk-row{display:flex;align-items:center;gap:7px;padding:5.5px 10px;font-weight:600}
.sk-row i{width:12px;height:12px;border-radius:3px;background:linear-gradient(135deg,var(--cyan),var(--blue));flex:none;display:block}
.sk-row:nth-child(odd) i{background:linear-gradient(135deg,#F6B73C,var(--orange))}
.sk-cols{display:grid;grid-template-columns:1.2fr 1fr}
.sk-cols > div{padding:6px 4px}
.sk-cols > div + div{background:#F2F9FD;border-left:1px solid var(--line)}
.sk-foot{background:var(--navy);height:18px;border-radius:0 0 6px 6px;display:flex;align-items:center;padding:0 8px}
.sk-foot i{width:26px;height:8px;border-radius:4px;background:var(--orange);display:block}
.style-body{padding:24px 26px 28px}
.style-body h3{font-size:18.5px;margin-bottom:8px}
.style-body p{font-size:14.5px;color:var(--gray)}
.style-tag{display:inline-block;font-size:12px;font-weight:700;color:var(--blue-dark);background:var(--bg-blue);border-radius:6px;padding:3px 10px;margin-bottom:12px}

/* ---------- 使用场景 ---------- */
.scene-card{position:relative;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 30px}
.scene-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:var(--blue)}
.scene-card:nth-child(2)::before{background:var(--orange)}
.scene-card:nth-child(3)::before{background:var(--cyan)}
.scene-card:nth-child(4)::before{background:#5AD19A}
.scene-card:hover{border-color:var(--cyan);box-shadow:var(--shadow-md)}
.scene-emoji{
  width:52px;height:52px;border-radius:13px;background:var(--bg-soft);border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:18px;
}
.scene-card h3{font-size:19px;margin-bottom:10px}
.scene-card p{font-size:15px;color:var(--gray)}

/* ---------- 用户评价 ---------- */
.review-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px 30px;display:flex;flex-direction:column;gap:18px}
.review-card:hover{border-color:var(--cyan);box-shadow:var(--shadow-md)}
.review-stars{color:#F5A623;font-size:17px;letter-spacing:3px}
.review-text{font-size:15.5px;color:var(--ink);flex:1}
.review-who{display:flex;align-items:center;gap:14px;border-top:1px dashed var(--line);padding-top:18px}
.review-ava{
  width:46px;height:46px;border-radius:50%;flex:none;
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:800;font-size:17px;
  background:linear-gradient(135deg,var(--cyan),var(--blue));
}
.review-ava--o{background:linear-gradient(135deg,#F6B73C,var(--orange))}
.review-ava--g{background:linear-gradient(135deg,#5AD19A,#27AE60)}
.review-ava--p{background:linear-gradient(135deg,#9B8CF2,#6C5CE7)}
.review-ava--r{background:linear-gradient(135deg,#F28CB1,#E0457B)}
.review-ava--t{background:linear-gradient(135deg,#4DD0E1,#00838F)}
.review-who b{display:block;font-size:15px;color:var(--navy)}
.review-who span{font-size:13px;color:var(--gray-light)}

/* ---------- CTA 横幅 ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--blue-deep),var(--blue) 55%,var(--cyan));
  border-radius:20px;padding:64px 56px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
}
.cta-band h2{color:#fff;font-size:32px;margin-bottom:10px}
.cta-band p{color:#DCF2FC;font-size:16.5px;max-width:560px}
.cta-band .btn--primary{box-shadow:0 8px 24px rgba(222,122,40,.4)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--navy);color:#9FC6DA;padding:64px 0 0;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:44px;padding-bottom:48px}
.footer-brand img{width:44px;height:44px;margin-bottom:16px}
.footer-brand p{max-width:300px;margin-top:6px}
.footer-brand .brand-name{color:#fff}
.site-footer h4{color:#fff;font-size:15.5px;margin-bottom:18px}
.footer-links{list-style:none;padding:0}
.footer-links li{margin-bottom:11px}
.footer-links a{color:#9FC6DA}
.footer-links a:hover{color:var(--cyan)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:22px 0;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13.5px;color:#7FA6BA;
}
.footer-bottom a{color:#7FA6BA}
.footer-bottom a:hover{color:var(--cyan)}

/* ---------- 内页横幅 ---------- */
.page-hero{background:linear-gradient(180deg,#F0FAFF,#FFFFFF);padding:72px 0 60px;text-align:center}
.page-hero .sec-tag{margin-bottom:18px}
.page-hero h1{font-size:42px;margin-bottom:16px}
.page-hero p{color:var(--gray);font-size:18px;max-width:720px;margin:0 auto}
.breadcrumb{font-size:13.5px;color:var(--gray-light);margin-bottom:22px}
.breadcrumb a{color:var(--gray-light)}
.breadcrumb a:hover{color:var(--blue)}
.breadcrumb ol{list-style:none;padding:0;display:inline-flex;gap:8px}
.breadcrumb li + li::before{content:"/";margin-right:8px;color:#B9CBD5}

/* ---------- 特性详情（左右交替） ---------- */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;padding:56px 0}
.feature-row + .feature-row{border-top:1px dashed var(--line)}
.feature-row--rev .feature-visual{order:2}
.feature-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;background:var(--bg-blue);
  color:var(--blue-dark);font-weight:800;font-size:18px;margin-bottom:18px;
}
.feature-row h2{font-size:29px;margin-bottom:16px}
.feature-row p{color:var(--gray);margin-bottom:18px}
.feature-list{list-style:none;padding:0;display:grid;gap:12px}
.feature-list li{position:relative;padding-left:30px;font-size:15px;color:var(--ink)}
.feature-list li::before{
  content:"";position:absolute;left:0;top:7px;width:17px;height:17px;border-radius:50%;
  background:var(--bg-blue) url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%231FA9E0" stroke-width="3.4" stroke-linecap="round" stroke-linejoin="round"><polyline points="20 6 9 17 4 12"/></svg>') center/10px no-repeat;
}
.feature-visual{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:18px;
  min-height:320px;display:flex;align-items:center;justify-content:center;padding:36px;
}

/* ---------- 下载中心 ---------- */
.dl-panel{
  background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;
  box-shadow:var(--shadow-md);
}
.dl-panel-head{
  background:linear-gradient(120deg,var(--navy),var(--navy-2));color:#fff;
  padding:40px 44px;display:flex;align-items:center;gap:24px;flex-wrap:wrap;
}
.dl-panel-head img{width:64px;height:64px}
.dl-panel-head h2{color:#fff;font-size:26px;margin-bottom:6px}
.dl-panel-head p{color:#9FC6DA;font-size:14.5px}
.dl-badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.dl-badge{
  font-size:12.5px;font-weight:700;padding:5px 13px;border-radius:999px;
  background:rgba(255,255,255,.12);color:#DCF2FC;border:1px solid rgba(255,255,255,.18);
}
.dl-badge--new{background:var(--orange);border-color:var(--orange);color:#fff}
.dl-panel-body{padding:40px 44px}
.dl-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:44px}
.dl-meta{list-style:none;padding:0;display:grid;gap:0;border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden}
.dl-meta li{display:flex;justify-content:space-between;gap:18px;padding:13px 20px;font-size:14.5px}
.dl-meta li:nth-child(odd){background:var(--bg-soft)}
.dl-meta li span{color:var(--gray-light);flex:none}
.dl-meta li b{color:var(--ink);font-weight:600;text-align:right}
.dl-actions{display:flex;flex-direction:column;gap:16px}
.dl-note{font-size:13px;color:var(--gray-light);text-align:center}
.req-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.req-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px}
.req-card h3{font-size:16.5px;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.req-card h3 i{width:9px;height:9px;border-radius:50%;background:var(--blue);display:block;flex:none}
.req-card ul{list-style:none;padding:0;display:grid;gap:9px}
.req-card li{font-size:14.5px;color:var(--gray);padding-left:18px;position:relative}
.req-card li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;background:var(--cyan)}
.changelog{border-left:3px solid var(--line);padding-left:0;list-style:none;display:grid;gap:34px}
.changelog > li{position:relative;padding-left:34px}
.changelog > li::before{
  content:"";position:absolute;left:-9.5px;top:6px;width:16px;height:16px;border-radius:50%;
  background:#fff;border:4px solid var(--cyan);
}
.changelog h3{font-size:18px;margin-bottom:4px}
.changelog time{font-size:13px;color:var(--gray-light);display:block;margin-bottom:10px}
.changelog ul{padding-left:1.1em;display:grid;gap:5px}
.changelog li{font-size:14.5px;color:var(--gray)}
.ver-table{width:100%;border-collapse:collapse;font-size:14.5px}
.ver-table th,.ver-table td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line)}
.ver-table th{background:var(--bg-soft);color:var(--navy);font-weight:700;font-size:13.5px}
.ver-table tr:hover td{background:var(--bg-blue)}
.ver-table .pill{display:inline-block;font-size:12px;font-weight:700;border-radius:6px;padding:2px 9px}
.pill--stable{background:#E2F6E9;color:#1E9E52}
.pill--pre{background:var(--orange-soft);color:var(--orange-dark)}

/* ---------- 下载弹窗 ---------- */
.modal-mask{
  position:fixed;inset:0;z-index:1000;background:rgba(10,32,45,.55);
  display:none;align-items:center;justify-content:center;padding:24px;
  overflow-y:auto;
}
.modal-mask.open{display:flex}
.modal{
  background:#fff;border-radius:20px;max-width:660px;width:100%;margin:auto;
  max-height:calc(100vh - 48px);overflow-y:auto;
  padding:40px 44px 36px;position:relative;box-shadow:0 24px 70px rgba(10,32,45,.35);
  animation:pop .22s ease;
}
@keyframes pop{from{transform:scale(.94) translateY(12px);opacity:0}to{transform:none;opacity:1}}
.modal-close{
  position:absolute;top:16px;right:16px;width:38px;height:38px;border-radius:10px;
  border:1px solid var(--line);background:#fff;cursor:pointer;font-size:19px;color:var(--gray);
  line-height:1;transition:.15s;
}
.modal-close:hover{background:var(--bg-soft);color:var(--navy)}
.modal-head{text-align:center;margin-bottom:28px}
.modal-head img{width:58px;height:58px;margin-bottom:12px}
.modal-head h3{font-size:24px;margin-bottom:6px}
.modal-head p{font-size:14px;color:var(--gray-light)}
.qr-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-bottom:24px}
.qr-card{
  border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center;
  transition:border-color .18s ease;
}
.qr-card:hover{border-color:var(--cyan)}
.qr-card img{width:172px;height:172px;margin:0 auto 14px;border:1px solid var(--line);border-radius:10px}
.qr-card h4{font-size:16px;margin-bottom:5px}
.qr-card p{font-size:12.5px;color:var(--gray-light);line-height:1.55}
.qr-tag{display:inline-block;font-size:11.5px;font-weight:700;color:#fff;background:var(--blue);border-radius:6px;padding:2px 10px;margin-bottom:12px}
.qr-tag--o{background:var(--orange)}
.modal-foot{text-align:center;font-size:13.5px;color:var(--gray)}
.modal-foot a{font-weight:600}
.modal-direct{margin-top:18px;text-align:center}

/* ---------- 使用指南 ---------- */
.steps{counter-reset:step;display:grid;gap:22px}
.step{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 32px 30px 96px;counter-increment:step;
}
.step::before{
  content:counter(step,decimal-leading-zero);
  position:absolute;left:28px;top:30px;width:46px;height:46px;border-radius:13px;
  background:var(--bg-blue);color:var(--blue-dark);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:17px;
}
.step h3{font-size:18.5px;margin-bottom:8px}
.step p{font-size:15px;color:var(--gray)}
.step code,.code{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:6px;
  padding:2px 8px;font-size:13.5px;color:var(--blue-deep);
  font-family:Consolas,"Courier New",monospace;
}
.tip{
  background:var(--orange-soft);border:1px solid #F7D9BE;border-radius:var(--radius-sm);
  padding:16px 20px;font-size:14px;color:#8A5A2B;margin-top:14px;
}
.tip b{color:var(--orange-dark)}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:16px;max-width:860px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden}
.faq-item summary{
  cursor:pointer;list-style:none;padding:20px 26px;font-weight:700;color:var(--navy);
  font-size:16.5px;display:flex;align-items:center;gap:14px;position:relative;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";position:absolute;right:24px;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:400;color:var(--blue);transition:transform .18s ease;
}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq-item summary:hover{color:var(--blue-dark)}
.faq-a{padding:0 26px 22px;font-size:15px;color:var(--gray)}
.faq-a p + p{margin-top:8px}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:26px;bottom:26px;z-index:800;width:46px;height:46px;border-radius:12px;
  background:var(--navy);color:#fff;border:none;cursor:pointer;font-size:19px;
  opacity:0;pointer-events:none;transition:opacity .2s ease,background .15s ease;
}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{background:var(--blue)}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:56px;padding:72px 0 80px}
  .hero h1{font-size:42px}
  .grid--4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .dl-grid{grid-template-columns:1fr}
  .feature-row{grid-template-columns:1fr;gap:36px}
  .feature-row--rev .feature-visual{order:0}
}
@media (max-width:820px){
  .nav-links{
    display:none;position:absolute;top:72px;left:0;right:0;
    background:#fff;border-bottom:1px solid var(--line);
    flex-direction:column;padding:14px 20px 20px;gap:4px;box-shadow:var(--shadow-md);
  }
  .nav-links.open{display:flex}
  .nav-toggle{display:flex}
  .nav-cta{display:none}
  .section{padding:64px 0}
  .grid--3,.styles-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:40px}
  .cta-band{padding:48px 32px;text-align:center;justify-content:center}
  .qr-grid{grid-template-columns:1fr}
  .req-grid{grid-template-columns:1fr}
  .page-hero h1{font-size:32px}
  .sec-head h2{font-size:28px}
  .dl-panel-head,.dl-panel-body{padding:30px 26px}
  .modal{padding:34px 24px 28px}
  .step{padding:26px 22px 26px 84px}
  .step::before{left:20px;top:26px}
}
@media (max-width:560px){
  .grid--4,.grid--2{grid-template-columns:1fr}
  .hero h1{font-size:34px}
  .hero-actions .btn{width:100%;justify-content:center}
  .footer-grid{grid-template-columns:1fr}
  .hero-facts{gap:24px}
  .demo-menu{width:330px}
}