/* ═══════════════════════════════════════════════
   现代简洁主题 — 浅色渐变 + 圆润卡片
   zhcn-google.ac.cn
   ═══════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700;900&display=swap');

*{margin:0;padding:0;box-sizing:border-box}

:root{
  --bg:#f6f8fc;
  --white:#ffffff;
  --surface:#ffffff;
  --panel:#f0f2f8;
  --border:#e2e6ee;
  --blue:#1a73e8;
  --blue-light:#e8f0fe;
  --blue-dark:#174ea6;
  --green:#34a853;
  --green-light:#e6f4ea;
  --red:#ea4335;
  --yellow:#fbbc04;
  --txt:#1f2937;
  --txt-sec:#5f6368;
  --txt-dim:#9aa0a6;
  --shadow:0 2px 12px rgba(0,0,0,0.06);
  --shadow-lg:0 8px 30px rgba(0,0,0,0.08);
  --sans:'Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI','Microsoft YaHei',sans-serif;
  --radius:16px;
  --radius-sm:10px;
}

html{scroll-behavior:smooth}
body{
  font-family:var(--sans);line-height:1.7;color:var(--txt);
  background:var(--bg);min-height:100vh;overflow-x:hidden;
}
a{color:var(--blue);text-decoration:none;transition:color .2s}
a:hover{color:var(--blue-dark)}

/* ═══ 导航栏 ═══ */
.topbar{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(255,255,255,0.88);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);padding:0 2rem;
}
.topbar-inner{
  max-width:1100px;margin:0 auto;height:60px;
  display:flex;align-items:center;justify-content:space-between;
}
.brand{
  display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.05rem;
  color:var(--txt);text-decoration:none;
}
.brand svg{width:30px;height:30px;color:var(--blue)}
.brand .prompt{display:none}
.nav-list{display:flex;gap:4px;list-style:none}
.nav-list a{
  font-size:.9rem;color:var(--txt-sec);padding:8px 18px;border-radius:24px;
  transition:all .2s;font-weight:500;
}
.nav-list a:hover{color:var(--blue);background:var(--blue-light)}
.nav-list a.on{color:var(--blue);background:var(--blue-light);font-weight:700}

/* ═══ 主视觉区 ═══ */
.hero{
  min-height:88vh;display:flex;align-items:center;
  padding:100px 2rem 60px;position:relative;overflow:hidden;
  background:linear-gradient(135deg,#e8f0fe 0%,#f6f8fc 40%,#e6f4ea 100%);
}
.hero::before{
  content:'';position:absolute;top:-120px;right:-80px;
  width:500px;height:500px;border-radius:50%;
  background:radial-gradient(circle,rgba(26,115,232,0.12),transparent 70%);
  pointer-events:none;
}
.hero::after{
  content:'';position:absolute;bottom:-100px;left:-60px;
  width:400px;height:400px;border-radius:50%;
  background:radial-gradient(circle,rgba(52,168,83,0.1),transparent 70%);
  pointer-events:none;
}
.hero-inner{
  max-width:1100px;margin:0 auto;width:100%;
  display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center;
}
.hero-text{position:relative;z-index:1}
.hero-tag{
  display:inline-block;font-size:.82rem;color:var(--blue);
  padding:6px 18px;border-radius:20px;margin-bottom:1.5rem;
  background:var(--blue-light);font-weight:600;
}
.hero h1{
  font-size:clamp(2rem,4.5vw,3.2rem);font-weight:900;
  line-height:1.25;margin-bottom:1.2rem;color:var(--txt);
}
.hero h1 .hl{
  color:var(--blue);
  background:linear-gradient(135deg,var(--blue),var(--green));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero h1 .cursor{display:none}
.hero-desc{
  font-size:1.05rem;color:var(--txt-sec);margin-bottom:2rem;
  max-width:460px;line-height:1.9;
}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ── 按钮 ── */
.btn-dl{
  font-size:.95rem;font-weight:700;color:#fff;background:var(--blue);border:none;
  padding:14px 32px;border-radius:28px;cursor:pointer;
  display:inline-flex;align-items:center;gap:8px;
  box-shadow:0 4px 14px rgba(26,115,232,0.3);transition:all .25s;
}
.btn-dl:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(26,115,232,0.4);background:var(--blue-dark)}
.btn-dl svg{width:18px;height:18px}
.btn-ghost{
  font-size:.95rem;font-weight:600;color:var(--blue);background:var(--white);
  border:1.5px solid var(--border);padding:14px 32px;border-radius:28px;
  cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:all .25s;
  text-decoration:none;
}
.btn-ghost:hover{border-color:var(--blue);background:var(--blue-light)}

/* 主视觉图 */
.hero-visual{display:flex;justify-content:center;position:relative;z-index:1}
.hero-img{
  width:100%;max-width:440px;border-radius:var(--radius);
  background:var(--white);box-shadow:var(--shadow-lg);
  overflow:hidden;padding:1.5rem;
}
.hero-img .browser-bar{
  display:flex;align-items:center;gap:6px;padding-bottom:1rem;
  border-bottom:1px solid var(--border);margin-bottom:1rem;
}
.hero-img .dot{width:10px;height:10px;border-radius:50%}
.hero-img .dot:nth-child(1){background:var(--red)}
.hero-img .dot:nth-child(2){background:var(--yellow)}
.hero-img .dot:nth-child(3){background:var(--green)}
.hero-img .url-bar{
  flex:1;margin-left:12px;background:var(--panel);border-radius:8px;
  height:28px;display:flex;align-items:center;padding:0 12px;
  font-size:.75rem;color:var(--txt-dim);
}
.hero-img .preview-body{
  background:linear-gradient(135deg,var(--blue-light),var(--green-light));
  border-radius:12px;padding:2.5rem;text-align:center;
}
.hero-img .preview-body svg{width:64px;height:64px;color:var(--blue);margin-bottom:1rem}
.hero-img .preview-body p{font-size:.9rem;color:var(--txt-sec);font-weight:500}

/* 数据条 */
.stats-strip{
  display:flex;gap:1rem;margin-top:3rem;max-width:1100px;margin-left:auto;margin-right:auto;
}
.stats-strip .stt{
  flex:1;text-align:center;padding:20px 16px;background:var(--white);
  border-radius:var(--radius-sm);box-shadow:var(--shadow);
}
.stats-strip .stt strong{
  display:block;font-size:1.6rem;font-weight:900;
  color:var(--blue);margin-bottom:4px;
}
.stats-strip .stt span{font-size:.82rem;color:var(--txt-sec)}

/* ═══ 通用区块 ═══ */
.sec{padding:5rem 2rem}
.sec-alt{background:var(--white)}
.wrap{max-width:1100px;margin:0 auto}
.sec-head{text-align:center;margin-bottom:3rem}
.sec-label{
  display:inline-block;font-size:.82rem;color:var(--blue);font-weight:600;
  margin-bottom:.8rem;padding:6px 18px;border-radius:20px;
  background:var(--blue-light);
}
.sec-title{
  font-size:clamp(1.6rem,3.5vw,2.4rem);font-weight:900;
  color:var(--txt);margin-bottom:.6rem;line-height:1.3;
}
.sec-title .hl{
  color:var(--blue);
  background:linear-gradient(135deg,var(--blue),var(--green));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.sec-sub{font-size:1rem;color:var(--txt-sec);max-width:500px;margin:0 auto}

/* ═══ 功能卡片网格 ═══ */
.hex-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px;
}
.hex-card{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius);
  padding:1.8rem;position:relative;overflow:hidden;transition:all .3s;
}
.hex-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--blue),var(--green));
  opacity:0;transition:opacity .3s;border-radius:var(--radius) var(--radius) 0 0;
}
.hex-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.hex-card:hover::before{opacity:1}
.hex-ico{
  width:52px;height:52px;border-radius:14px;margin-bottom:1.2rem;
  background:var(--blue-light);display:flex;align-items:center;justify-content:center;
}
.hex-ico svg{width:24px;height:24px;color:var(--blue)}
.hex-card h3{font-size:1.1rem;font-weight:700;margin-bottom:.5rem;color:var(--txt)}
.hex-card p{font-size:.9rem;color:var(--txt-sec);line-height:1.7;margin-bottom:1rem}
.hex-metric{
  display:flex;align-items:baseline;gap:6px;
  padding-top:.8rem;border-top:1px solid var(--border);
}
.hex-metric strong{font-size:1.4rem;font-weight:900;color:var(--blue)}
.hex-metric span{font-size:.82rem;color:var(--txt-sec)}

/* ═══ 平台下载卡片 ═══ */
.plat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.plat-card{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius);
  padding:2rem;text-align:center;transition:all .3s;position:relative;
}
.plat-card.main{border-color:var(--blue);box-shadow:0 4px 20px rgba(26,115,232,0.12)}
.plat-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.plat-ico{
  width:60px;height:60px;margin:0 auto 1.2rem;border-radius:16px;
  background:var(--blue-light);display:flex;align-items:center;justify-content:center;
}
.plat-ico svg{width:28px;height:28px;color:var(--blue)}
.plat-badge{
  position:absolute;top:14px;right:14px;font-size:.72rem;
  color:#fff;padding:4px 12px;border-radius:12px;
  background:var(--blue);font-weight:600;
}
.plat-card h3{font-size:1.1rem;font-weight:700;margin-bottom:.3rem}
.plat-card p{font-size:.85rem;color:var(--txt-sec);margin-bottom:.5rem}
.plat-specs{font-size:.78rem;color:var(--txt-dim);margin-bottom:1.2rem}
.plat-specs span{display:block}
.btn-plat{
  font-size:.88rem;font-weight:600;color:var(--blue);background:var(--blue-light);
  width:100%;border:none;padding:12px;border-radius:12px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;gap:6px;transition:all .25s;
}
.btn-plat:hover{background:var(--blue);color:#fff}
.btn-plat.primary{color:#fff;background:var(--blue);box-shadow:0 4px 14px rgba(26,115,232,0.3)}
.btn-plat.primary:hover{background:var(--blue-dark);box-shadow:0 6px 20px rgba(26,115,232,0.4)}

/* ═══ 常见问题 ═══ */
.faq-list{max-width:760px;margin:0 auto}
.faq-item{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius-sm);
  margin-bottom:10px;overflow:hidden;transition:all .3s;
}
.faq-item:hover{box-shadow:var(--shadow)}
.faq-q{
  width:100%;display:flex;justify-content:space-between;align-items:center;
  padding:1.1rem 1.4rem;background:transparent;border:none;color:var(--txt);
  cursor:pointer;font-size:.95rem;font-weight:600;text-align:left;
  font-family:var(--sans);
}
.faq-q::before{display:none}
.faq-q span{flex:1}
.faq-chevron{color:var(--txt-dim);transition:transform .3s;flex-shrink:0}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s;
  padding:0 1.4rem 0 1.4rem;color:var(--txt-sec);line-height:1.8;font-size:.9rem;
}
.faq-item.open .faq-a{max-height:400px;padding:0 1.4rem 1.2rem 1.4rem}
.faq-item.open .faq-chevron{transform:rotate(180deg)}
.faq-item.open{border-color:var(--blue);box-shadow:0 4px 16px rgba(26,115,232,0.08)}

/* ═══ 行动号召 ═══ */
.cta-block{
  text-align:center;padding:5rem 2rem;
  background:linear-gradient(135deg,#e8f0fe,#e6f4ea);
  border-radius:var(--radius);margin:0 2rem;
}
.cta-block h2{font-size:clamp(1.6rem,3.5vw,2.2rem);font-weight:900;margin-bottom:.6rem;color:var(--txt)}
.cta-block h2 .hl{
  color:var(--blue);
  background:linear-gradient(135deg,var(--blue),var(--green));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.cta-block p{color:var(--txt-sec);font-size:1rem;margin-bottom:2rem}

/* ═══ 页脚 ═══ */
.site-footer{background:var(--white);border-top:1px solid var(--border);padding:2rem;text-align:center}
.security{
  display:flex;align-items:center;justify-content:center;gap:8px;
  margin-bottom:.8rem;font-size:.88rem;color:var(--green);font-weight:600;
}
.security svg{width:18px;height:18px}
.site-footer .copy{font-size:.78rem;color:var(--txt-dim)}

/* ═══ 下载页 ═══ */
.dl-hero{padding:100px 2rem 60px;background:linear-gradient(135deg,#e8f0fe 0%,#f6f8fc 40%,#e6f4ea 100%)}
.dl-hero .sec-head{margin-bottom:2.5rem}
.dl-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.dl-main{
  grid-column:1/-1;display:grid;grid-template-columns:auto 1fr;gap:2rem;
  align-items:center;background:var(--white);border:2px solid var(--blue);
  border-radius:var(--radius);padding:2rem;position:relative;
  box-shadow:0 4px 20px rgba(26,115,232,0.1);
}
.dl-main .plat-badge{top:14px;right:14px}
.dl-main .dl-ico{
  width:80px;height:80px;border-radius:20px;
  background:var(--blue-light);display:flex;align-items:center;justify-content:center;
}
.dl-main .dl-ico svg{width:36px;height:36px;color:var(--blue)}
.dl-info h3{font-size:1.3rem;font-weight:700;margin-bottom:.3rem;color:var(--txt)}
.dl-info .desc{color:var(--txt-sec);font-size:.9rem;margin-bottom:1rem}
.dl-meta{display:flex;gap:1.5rem;margin-bottom:1.2rem}
.dl-meta .m{font-size:.82rem}
.dl-meta .m em{font-style:normal;display:block;color:var(--txt-dim);font-size:.72rem}
.dl-meta .m strong{color:var(--txt);font-weight:700}
.dl-sec{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius);
  padding:1.8rem;text-align:center;transition:all .3s;
}
.dl-sec:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.dl-sec .dl-ico{
  width:56px;height:56px;margin:0 auto 1rem;border-radius:14px;
  background:var(--blue-light);display:flex;align-items:center;justify-content:center;
}
.dl-sec .dl-ico svg{width:28px;height:28px;color:var(--blue)}
.dl-sec h3{font-size:1.05rem;font-weight:700;margin-bottom:.3rem;color:var(--txt)}
.dl-sec p{font-size:.85rem;color:var(--txt-sec);margin-bottom:1rem}
.btn-sec{
  font-size:.88rem;color:var(--blue);background:var(--blue-light);border:none;
  padding:10px 24px;border-radius:12px;cursor:pointer;
  display:inline-flex;align-items:center;gap:6px;transition:all .25s;font-weight:600;
}
.btn-sec:hover{background:var(--blue);color:#fff}

/* ═══ 安装步骤 ═══ */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px}
.step-card{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius);
  padding:2rem;text-align:center;transition:all .3s;
}
.step-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.step-num{
  width:40px;height:40px;border-radius:12px;margin:0 auto .8rem;
  background:var(--blue);display:flex;align-items:center;justify-content:center;
  font-weight:800;color:#fff;font-size:1.1rem;
}
.step-card .step-ico{margin-bottom:.8rem}
.step-card .step-ico svg{width:32px;height:32px;color:var(--blue)}
.step-card h3{font-size:1rem;font-weight:700;margin-bottom:.4rem;color:var(--txt)}
.step-card p{font-size:.85rem;color:var(--txt-sec);line-height:1.6}

/* ═══ 系统要求表 ═══ */
.sys-table{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.sys-head{
  display:grid;grid-template-columns:1.2fr 1fr 1fr .8fr .8fr;
  background:var(--blue);font-weight:700;font-size:.85rem;color:#fff;
}
.sys-head>div,.sys-row>div{padding:.8rem 1rem}
.sys-row{
  display:grid;grid-template-columns:1.2fr 1fr 1fr .8fr .8fr;
  border-top:1px solid var(--border);font-size:.85rem;color:var(--txt-sec);
}
.sys-row .plat{display:flex;align-items:center;gap:8px;font-weight:600;color:var(--txt)}
.sys-row .plat svg{width:20px;height:20px;color:var(--blue)}

/* ═══ 版本记录 ═══ */
.ver-list{max-width:760px;margin:0 auto;position:relative;padding-left:24px}
.ver-list::before{
  content:'';position:absolute;left:6px;top:0;bottom:0;
  width:2px;background:var(--border);
}
.ver-item{position:relative;margin-bottom:1.5rem;padding-left:24px}
.ver-dot{
  position:absolute;left:-24px;top:14px;width:14px;height:14px;border-radius:50%;
  background:var(--blue);border:3px solid var(--bg);
  box-shadow:0 0 0 3px rgba(26,115,232,0.2);
}
.ver-content{
  background:var(--white);border:1px solid var(--border);
  border-radius:var(--radius-sm);padding:1.2rem;
}
.ver-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:.8rem}
.ver-num{font-weight:700;color:var(--blue);font-size:1rem}
.ver-date{font-size:.82rem;color:var(--txt-dim)}
.ver-list ul{list-style:none;display:flex;flex-direction:column;gap:6px}
.ver-list li{display:flex;align-items:center;gap:8px;font-size:.88rem;color:var(--txt-sec)}
.ver-list li svg{width:14px;height:14px;color:var(--green);flex-shrink:0}

/* ═══ 中文文章页 ═══ */
.article-hero{
  padding:100px 2rem 60px;
  background:linear-gradient(135deg,#e8f0fe 0%,#f6f8fc 40%,#e6f4ea 100%);
}
.article-body{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:1fr 300px;gap:2.5rem}

/* 文章卡片（替代terminal） */
.article-main-col .term{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius);
  overflow:hidden;margin-bottom:1.5rem;transition:box-shadow .3s;
}
.article-main-col .term:hover{box-shadow:var(--shadow-lg)}
.article-main-col .term-bar{
  display:flex;align-items:center;gap:8px;padding:12px 18px;
  background:var(--panel);border-bottom:1px solid var(--border);
  font-size:.82rem;color:var(--txt-dim);
}
.article-main-col .term-dots{display:flex;gap:6px}
.article-main-col .term-dots i{width:10px;height:10px;border-radius:50%;display:block}
.article-main-col .term-dots i:nth-child(1){background:var(--red)}
.article-main-col .term-dots i:nth-child(2){background:var(--yellow)}
.article-main-col .term-dots i:nth-child(3){background:var(--green)}
.article-main-col .term-title{flex:1;text-align:center;color:var(--txt-dim);font-weight:500}
.article-main-col .term-body{padding:1.8rem;font-family:var(--sans)}
.article-main-col .term-body h2{
  font-size:1.3rem;font-weight:800;color:var(--txt);margin-bottom:1rem;
}
.article-main-col .term-body p{
  color:var(--txt-sec);line-height:1.9;margin-bottom:1rem;font-size:.95rem;
}
.article-main-col .term-body .lead{font-size:1.02rem;color:var(--txt)}
.article-main-col blockquote{
  border-left:4px solid var(--blue);padding:1rem 1.4rem;margin:1.2rem 0;
  background:var(--blue-light);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
}
.article-main-col blockquote p{color:var(--blue-dark);font-style:normal;margin:0;font-weight:500}

/* 文章功能列表 */
.feat-list{display:flex;flex-direction:column;gap:10px;margin:1.2rem 0}
.feat-row{
  display:flex;gap:14px;align-items:flex-start;
  padding:1rem;border-radius:var(--radius-sm);border:1px solid var(--border);
  background:var(--white);transition:all .2s;
}
.feat-row:hover{box-shadow:var(--shadow);border-color:var(--blue)}
.feat-row .f-ico{
  width:40px;height:40px;flex-shrink:0;border-radius:12px;
  background:var(--blue-light);display:flex;align-items:center;justify-content:center;
}
.feat-row .f-ico svg{width:20px;height:20px;color:var(--blue)}
.feat-row h4{font-size:.95rem;font-weight:700;color:var(--txt);margin-bottom:2px}
.feat-row p{font-size:.85rem;color:var(--txt-sec);margin:0}

/* 侧边栏 */
.side-col{position:sticky;top:80px}
.side-card{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius);
  padding:1.5rem;margin-bottom:1rem;box-shadow:var(--shadow);
}
.side-card h3{font-size:1rem;font-weight:700;margin-bottom:.5rem;color:var(--txt)}
.side-card p{font-size:.85rem;color:var(--txt-sec);margin-bottom:1rem}
.btn-side{
  display:flex;align-items:center;justify-content:center;gap:6px;
  font-size:.9rem;font-weight:700;color:#fff;background:var(--blue);
  padding:12px;border-radius:12px;text-decoration:none;transition:all .25s;
}
.btn-side:hover{background:var(--blue-dark);box-shadow:0 4px 14px rgba(26,115,232,0.3)}
.side-stats{display:flex;flex-direction:column;gap:12px}
.side-stat{display:flex;justify-content:space-between;align-items:center}
.side-stat strong{font-size:1.2rem;font-weight:900;color:var(--blue)}
.side-stat span{font-size:.82rem;color:var(--txt-sec)}

/* 标签云 */
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;max-width:760px;margin:0 auto}
.tag{
  font-size:.82rem;padding:8px 18px;border-radius:20px;
  border:1px solid var(--border);color:var(--txt-sec);transition:all .2s;
  background:var(--white);font-weight:500;
}
.tag:hover{color:var(--blue);border-color:var(--blue);background:var(--blue-light)}
.tag-lg,.tag.tag-lg{font-size:.88rem;font-weight:700;color:var(--txt);background:var(--blue-light);border-color:rgba(26,115,232,0.2)}

/* 功能展示卡 */
.showcase-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.showcase-card{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius);
  padding:2rem;transition:all .3s;
}
.showcase-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.showcase-card .sc-ico{
  width:52px;height:52px;border-radius:14px;margin-bottom:1.2rem;
  background:var(--blue-light);display:flex;align-items:center;justify-content:center;
}
.showcase-card .sc-ico svg{width:24px;height:24px;color:var(--blue)}
.showcase-card h3{font-size:1.05rem;font-weight:700;margin-bottom:.4rem;color:var(--txt)}
.showcase-card p{font-size:.88rem;color:var(--txt-sec);line-height:1.7;margin-bottom:.8rem}
.showcase-tag{
  font-size:.75rem;padding:4px 12px;border-radius:12px;
  background:var(--green-light);color:var(--green);
  font-weight:600;display:inline-block;
}

/* ═══ 响应式 ═══ */
@media(max-width:1024px){
  .article-body{grid-template-columns:1fr}
  .side-col{position:static;display:grid;grid-template-columns:1fr 1fr;gap:1rem}
}
@media(max-width:768px){
  .topbar{padding:0 1rem}
  .nav-list a{font-size:.8rem;padding:6px 12px}
  .hero-inner{grid-template-columns:1fr;text-align:center}
  .hero-desc{margin:0 auto 2rem}
  .hero-actions{justify-content:center}
  .hero-img{max-width:100%}
  .stats-strip{flex-direction:column;gap:.8rem}
  .hex-grid,.plat-row,.steps,.showcase-grid{grid-template-columns:1fr}
  .dl-grid{grid-template-columns:1fr}
  .dl-main{grid-template-columns:1fr;text-align:center}
  .dl-meta{justify-content:center;flex-wrap:wrap}
  .sys-head,.sys-row{grid-template-columns:1fr 1fr;gap:2px}
  .sys-head>div,.sys-row>div{padding:.5rem .6rem;font-size:.78rem}
  .side-col{grid-template-columns:1fr}
  .cta-block{margin:0;border-radius:0}
}

/* 滚动条 */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--blue)}

@keyframes spin{from{transform:rotate(0)}to{transform:rotate(360deg)}}