/* =========================================================
   QuickQ 官网 · 共享设计系统（蓝白主题）
   ========================================================= */
:root{
  --bg:#FFFFFF;
  --bg-tint:#F4F8FF;      /* 浅蓝底 */
  --bg-tint-2:#EAF2FF;    /* 更浅蓝底 */
  --ink:#0B1E44;          /* 深藏蓝正文 */
  --ink-soft:#33486E;     /* 次级文字 */
  --muted:#64789F;        /* 弱文字 */
  --blue:#0A6CFF;         /* 主色蓝 */
  --blue-strong:#0051E0;  /* 深蓝 */
  --blue-deep:#083A8C;
  --sky:#4FA3FF;          /* 天蓝 */
  --blue-soft:#E6F0FF;    /* 蓝浅填充 */
  --line:#E3EBF7;         /* 分隔线 */
  --line-strong:#C8D9F2;
  --white:#FFFFFF;
  --shadow:0 18px 44px rgba(20,60,140,.10);
  --shadow-sm:0 8px 22px rgba(20,60,140,.08);
  --radius:16px;
  --font-display:'Space Grotesk','Noto Sans SC',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-body:'Noto Sans SC',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--ink);
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
.container{width:min(1160px,92%);margin:0 auto}
section{position:relative}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:4px}

/* ---- 排版 ---- */
h1,h2,h3,h4,.display{font-family:var(--font-display);font-weight:600;line-height:1.18;letter-spacing:-.01em;color:var(--ink)}
h1{font-size:clamp(2.2rem,5.2vw,3.7rem);font-weight:700}
h2{font-size:clamp(1.7rem,3.6vw,2.5rem)}
h3{font-size:1.18rem}
.lead{color:var(--ink-soft);font-size:clamp(1.02rem,1.7vw,1.15rem);max-width:62ch}
.eyebrow{
  display:inline-flex;align-items:center;gap:.55rem;
  font-size:.82rem;letter-spacing:.18em;font-weight:700;color:var(--blue);
  text-transform:uppercase;margin-bottom:1rem;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--blue);border-radius:2px}
.section-head{max-width:760px;margin-bottom:3rem}
.section-head h2{margin-bottom:.7rem}
.section-head p{color:var(--ink-soft)}
.section-head.center{margin:0 auto 3rem;text-align:center}
.section-head.center .eyebrow{justify-content:center}
.section-head.center .eyebrow::before{display:none}
.section-head.center .eyebrow::after{content:"";width:22px;height:2px;background:var(--blue);border-radius:2px}

/* ---- 按钮 ---- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.78rem 1.6rem;border-radius:999px;font-weight:600;font-size:.96rem;
  transition:transform .2s,box-shadow .2s,background .2s,color .2s;
  cursor:pointer;border:1px solid transparent;font-family:var(--font-body);white-space:nowrap;
}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 24px rgba(10,108,255,.30)}
.btn-primary:hover{background:var(--blue-strong);transform:translateY(-2px);box-shadow:0 12px 32px rgba(10,108,255,.40)}
.btn-ghost{border-color:var(--line-strong);color:var(--blue-deep);background:#fff}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn-soft{background:var(--blue-soft);color:var(--blue-strong)}
.btn-soft:hover{background:var(--blue);color:#fff}
.btn-lg{padding:1rem 2.1rem;font-size:1.04rem}
.btn-sm{padding:.55rem 1.1rem;font-size:.88rem}
.btn-block{width:100%}

/* ---- 顶部导航 ---- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:background .3s,border-color .3s,box-shadow .3s;
}
.site-header.scrolled{background:rgba(255,255,255,.96);border-bottom-color:var(--line);box-shadow:0 6px 20px rgba(20,60,140,.05)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;gap:1rem}
.brand{display:flex;align-items:center;gap:.6rem;font-family:var(--font-display);font-weight:700;font-size:1.3rem;color:var(--ink);letter-spacing:.01em}
.brand-mark{width:36px;height:36px;flex:none}
.nav-links{display:flex;align-items:center;gap:1.5rem}
.nav-links a{font-size:.95rem;color:var(--ink-soft);transition:color .2s;position:relative}
.nav-links a:hover{color:var(--blue)}
.nav-links a.is-active{color:var(--blue);font-weight:600}
.nav-cta{display:flex;align-items:center;gap:.8rem}
.nav-toggle{display:none;background:none;border:0;color:var(--ink);cursor:pointer;padding:.4rem}

/* ---- Hero（首页） ---- */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#F4F9FF 0%,#EAF3FF 45%,#FFFFFF 100%)}
.hero::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(600px 320px at 85% 8%, rgba(79,163,255,.16), transparent 60%),
    radial-gradient(500px 300px at 8% 90%, rgba(10,108,255,.12), transparent 60%);
}
.hero-inner{position:relative;z-index:1;padding:clamp(4rem,9vw,7rem) 0 clamp(3rem,7vw,5rem)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:3rem;align-items:center}
.hero-copy h1{margin:.4rem 0 1.2rem;text-wrap:balance}
.hero-copy h1 .accent{color:var(--blue)}
.hero-copy .lead{margin-bottom:2rem}
.hero-actions{display:flex;flex-wrap:wrap;gap:.9rem;margin-bottom:2.2rem}
.hero-trust{display:flex;flex-wrap:wrap;gap:1rem}
.trust-chip{
  display:flex;align-items:center;gap:.55rem;font-size:.86rem;color:var(--ink-soft);
  padding:.5rem 1rem;border:1px solid var(--line-strong);border-radius:999px;background:#fff;
}
.trust-chip b{color:var(--blue);font-family:var(--font-display);font-size:.98rem}
.hero-visual{position:relative}
.hero-metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem;position:relative;z-index:2}
.metric{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:1.3rem 1.4rem;box-shadow:var(--shadow-sm);
}
.metric b{display:block;font-family:var(--font-display);font-size:1.9rem;font-weight:700;color:var(--blue);line-height:1.1}
.metric span{font-size:.84rem;color:var(--muted)}
.net-orb{position:absolute;inset:-6%;z-index:1;opacity:.85;pointer-events:none}

/* ---- 数据条 ---- */
.stats-strip{border-block:1px solid var(--line);background:var(--bg-tint)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;padding:2.4rem 0}
.stat{text-align:center}
.stat b{display:block;font-family:var(--font-display);font-size:clamp(1.6rem,3.2vw,2.3rem);font-weight:700;color:var(--ink)}
.stat b em{font-style:normal;color:var(--blue)}
.stat span{font-size:.87rem;color:var(--muted)}

/* ---- 区块 ---- */
.block{padding:clamp(3.5rem,8vw,6.5rem) 0}
.block-alt{background:var(--bg-tint);border-block:1px solid var(--line)}

/* ---- 特性卡片 ---- */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.feat{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:1.8rem 1.7rem;transition:transform .25s,border-color .25s,box-shadow .25s;
}
.feat:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-sm)}
.feat-ico{width:50px;height:50px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:var(--blue-soft);color:var(--blue);margin-bottom:1.1rem}
.feat h3{margin-bottom:.5rem}
.feat p{font-size:.94rem;color:var(--ink-soft)}

/* ---- 场景卡片 ---- */
.scen-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
.scen{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.8rem 1.6rem;transition:transform .25s,box-shadow .25s}
.scen:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm)}
.scen-ico{width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;color:var(--blue-strong);background:var(--blue-soft);margin-bottom:1rem}
.scen h3{font-size:1.06rem;margin-bottom:.5rem}
.scen p{font-size:.9rem;color:var(--ink-soft)}

/* ---- 节点网络 ---- */
.net-wrap{display:grid;grid-template-columns:1fr 1fr;gap:3.5rem;align-items:center}
.net-map{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1rem;box-shadow:var(--shadow-sm)}
.net-map svg{width:100%;height:auto}
.net-copy ul{display:flex;flex-direction:column;gap:1.1rem;margin-top:1.6rem}
.net-copy li{display:flex;gap:.9rem;align-items:flex-start}
.net-copy li svg{flex:none;margin-top:.22rem;color:var(--blue)}
.net-copy li p{color:var(--ink-soft);font-size:.95rem}
.net-copy li b{color:var(--ink)}

/* ---- 平台卡片 ---- */
.plat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
.plat{
  display:flex;flex-direction:column;align-items:center;gap:.8rem;text-align:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:2.2rem 1rem;
  transition:border-color .25s,transform .25s,box-shadow .25s;
}
.plat:hover{border-color:var(--blue);transform:translateY(-4px);box-shadow:var(--shadow-sm)}
.plat svg{width:46px;height:46px;color:var(--blue)}
.plat b{font-family:var(--font-display);font-size:1.06rem}
.plat span{font-size:.84rem;color:var(--muted)}

/* ---- 价格 ---- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;align-items:stretch}
.price-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:2.1rem 1.9rem;display:flex;flex-direction:column;position:relative;transition:transform .25s,box-shadow .25s;
}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm)}
.price-card.hot{border-color:var(--blue);box-shadow:0 18px 44px rgba(10,108,255,.16)}
.price-tag{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--blue);color:#fff;font-size:.76rem;font-weight:700;letter-spacing:.05em;padding:.34rem 1rem;border-radius:999px;box-shadow:0 6px 16px rgba(10,108,255,.35)}
.price-card .p-name{font-family:var(--font-display);font-size:1.14rem;font-weight:600;margin-bottom:.55rem}
.price-card .p-desc{font-size:.88rem;color:var(--ink-soft);margin-bottom:1.4rem}
.price-card .p-price{font-family:var(--font-display);font-size:2.2rem;font-weight:700;color:var(--ink);margin-bottom:1.6rem}
.price-card .p-price small{font-size:.85rem;font-weight:500;color:var(--muted)}
.price-card ul{display:flex;flex-direction:column;gap:.65rem;margin-bottom:1.9rem;flex:1}
.price-card li{display:flex;gap:.6rem;align-items:flex-start;font-size:.93rem;color:var(--ink-soft)}
.price-card li svg{flex:none;margin-top:.3rem;color:var(--blue)}
.price-note{margin-top:2rem;text-align:center;color:var(--muted);font-size:.84rem}

/* ---- CTA 带 ---- */
.cta-band{position:relative;overflow:hidden;background:linear-gradient(120deg,#0A6CFF,#083A8C);color:#fff}
.cta-band::before{content:"";position:absolute;inset:0;background:radial-gradient(520px 260px at 80% 20%, rgba(255,255,255,.18), transparent 60%)}
.cta-inner{position:relative;z-index:1;text-align:center;padding:clamp(3rem,7vw,5rem) 0}
.cta-inner h2{color:#fff;margin:.5rem 0 1rem}
.cta-inner .lead{color:rgba(255,255,255,.86);margin:0 auto 2rem}
.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:.9rem}
.cta-band .btn-ghost{border-color:rgba(255,255,255,.45);color:#fff;background:transparent}
.cta-band .btn-ghost:hover{border-color:#fff;color:#fff}
.cta-mini{display:flex;justify-content:center;gap:1.8rem;flex-wrap:wrap;margin-top:1.9rem;color:rgba(255,255,255,.78);font-size:.86rem}
.cta-mini span{display:inline-flex;align-items:center;gap:.4rem}

/* ---- 常见问题（手风琴） ---- */
.faq{max-width:840px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:var(--radius);background:#fff;margin-bottom:.9rem;overflow:hidden;transition:border-color .25s}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item.open{border-color:var(--blue)}
.faq-q{
  width:100%;text-align:left;background:none;border:0;color:var(--ink);cursor:pointer;
  padding:1.25rem 1.5rem;font-size:1.02rem;font-weight:600;font-family:var(--font-body);
  display:flex;justify-content:space-between;align-items:center;gap:1rem;
}
.faq-q .ic{transition:transform .3s;flex:none;color:var(--blue)}
.faq-item.open .faq-q .ic{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-item.open .faq-a{max-height:480px}
.faq-a p{padding:0 1.5rem 1.35rem;color:var(--ink-soft);font-size:.95rem}

/* ---- 页面内页首（子页面 Hero） ---- */
.page-hero{background:linear-gradient(180deg,#EAF3FF,#FFFFFF);border-bottom:1px solid var(--line);padding:clamp(3rem,7vw,4.6rem) 0;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(560px 260px at 90% 0%, rgba(79,163,255,.18), transparent 60%)}
.page-hero .container{position:relative;z-index:1}
.page-hero .crumbs{font-size:.86rem;color:var(--muted);margin-bottom:1.2rem}
.page-hero .crumbs a{color:var(--muted)}
.page-hero .crumbs a:hover{color:var(--blue)}
.page-hero h1{margin-bottom:.9rem}
.page-hero .lead{color:var(--ink-soft)}
.breadcrumb-sep{margin:0 .4rem;color:var(--line-strong)}

/* ---- 下载页 ---- */
.dl-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem}
.dl-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:2rem;display:flex;gap:1.4rem;align-items:flex-start;transition:transform .25s,box-shadow .25s;
}
.dl-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm)}
.dl-ico{width:56px;height:56px;flex:none;border-radius:16px;background:var(--blue-soft);color:var(--blue);display:flex;align-items:center;justify-content:center}
.dl-body{flex:1}
.dl-body h3{display:flex;align-items:center;gap:.6rem}
.dl-body .ver{font-size:.78rem;color:var(--blue);background:var(--blue-soft);padding:.14rem .6rem;border-radius:999px;font-weight:600}
.dl-body p{font-size:.9rem;color:var(--ink-soft);margin:.4rem 0 1.1rem}
.dl-meta{display:flex;gap:1rem;margin-top:1rem;font-size:.8rem;color:var(--muted)}
.dl-meta span{display:inline-flex;align-items:center;gap:.35rem}

/* 系统要求表格 */
.req-table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.req-table th,.req-table td{padding:.95rem 1.2rem;text-align:left;border-bottom:1px solid var(--line);font-size:.92rem}
.req-table th{background:var(--bg-tint);color:var(--ink);font-weight:600;font-family:var(--font-display)}
.req-table tr:last-child td{border-bottom:0}
.req-table td:first-child{color:var(--muted);font-weight:500}
.req-table td:last-child{color:var(--ink-soft)}

/* ---- 平台详情页 ---- */
.dev-detail{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:2.2rem;margin-bottom:1.5rem;transition:box-shadow .25s;
}
.dev-detail:hover{box-shadow:var(--shadow-sm)}
.dev-head{display:flex;align-items:center;gap:1.2rem;margin-bottom:1.3rem;flex-wrap:wrap}
.dev-head .dl-ico{width:54px;height:54px;flex:none;border-radius:16px;background:var(--blue-soft);color:var(--blue);display:flex;align-items:center;justify-content:center}
.dev-head h3{font-size:1.3rem}
.dev-head .tag{font-size:.8rem;color:var(--blue-strong);background:var(--blue-soft);padding:.2rem .7rem;border-radius:999px;font-weight:600}
.dev-body p{color:var(--ink-soft);font-size:.95rem;max-width:72ch}
.dev-feats{display:grid;grid-template-columns:repeat(2,1fr);gap:.6rem 1.6rem;margin:1.3rem 0}
.dev-feats li{display:flex;gap:.6rem;align-items:flex-start;font-size:.92rem;color:var(--ink-soft)}
.dev-feats li svg{flex:none;margin-top:.28rem;color:var(--blue)}
.dev-actions{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:1.2rem}

/* ---- 使用教程 ---- */
.steps{max-width:760px;margin:0 auto}
.step{display:grid;grid-template-columns:64px 1fr;gap:1.4rem;position:relative;padding-bottom:2.4rem}
.step:last-child{padding-bottom:0}
.step::before{content:"";position:absolute;left:31px;top:64px;bottom:8px;width:2px;background:var(--line-strong)}
.step:last-child::before{display:none}
.step-num{width:64px;height:64px;border-radius:18px;background:var(--blue);color:#fff;font-family:var(--font-display);font-weight:700;font-size:1.5rem;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 22px rgba(10,108,255,.30);position:relative;z-index:1}
.step-body h3{margin-bottom:.5rem}
.step-body p{color:var(--ink-soft);font-size:.95rem;margin-bottom:.6rem}
.step-body ul{display:flex;flex-direction:column;gap:.4rem;margin-top:.6rem}
.step-body li{display:flex;gap:.6rem;align-items:flex-start;font-size:.92rem;color:var(--ink-soft)}
.step-body li svg{flex:none;margin-top:.28rem;color:var(--blue)}
.tip-box{background:var(--blue-soft);border:1px solid var(--line-strong);border-left:4px solid var(--blue);border-radius:12px;padding:1rem 1.2rem;font-size:.9rem;color:var(--blue-deep);margin-top:1rem}

/* ---- 长尾词支撑页 / 资源中心 ---- */
.res-index{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem;margin-bottom:3rem}
.res-group{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem}
.res-group h3{font-size:1.05rem;margin-bottom:.9rem;display:flex;align-items:center;gap:.55rem}
.res-group h3 svg{color:var(--blue)}
.res-group ul{display:flex;flex-direction:column;gap:.55rem}
.res-group a{font-size:.92rem;color:var(--ink-soft);display:flex;justify-content:space-between;align-items:center;padding:.45rem .6rem;border-radius:8px;transition:background .2s,color .2s}
.res-group a:hover{background:var(--blue-soft);color:var(--blue-strong)}
.res-group a span{color:var(--muted);font-size:.8rem}
.lt-section{max-width:860px;margin:0 auto 2.6rem}
.lt-section h2{font-size:clamp(1.4rem,2.6vw,1.9rem);margin-bottom:.6rem}
.lt-section .lt-lead{color:var(--ink-soft);margin-bottom:1.4rem;font-size:.97rem}
.lt-qa{border-left:3px solid var(--blue-soft);padding-left:1.2rem;margin-bottom:1.2rem}
.lt-qa h3{font-size:1.04rem;margin-bottom:.35rem}
.lt-qa p{color:var(--ink-soft);font-size:.94rem}

/* ---- 法律条款页 ---- */
.legal{max-width:820px;margin:0 auto}
.legal .meta{color:var(--muted);font-size:.86rem;margin-bottom:2.4rem}
.legal h2{font-size:1.3rem;margin:2.2rem 0 .8rem}
.legal h3{font-size:1.1rem;margin:1.6rem 0 .6rem}
.legal p,.legal li{color:var(--ink-soft);font-size:.96rem;margin-bottom:.6rem}
.legal ul{padding-left:1.2rem;margin-bottom:.8rem}
.legal ul li{list-style:disc}
.legal .updated{display:inline-flex;align-items:center;gap:.5rem;background:var(--blue-soft);color:var(--blue-strong);padding:.5rem 1rem;border-radius:999px;font-size:.86rem;margin-bottom:1.6rem}

/* ---- 404 ---- */
.notfound{min-height:62vh;display:flex;align-items:center;text-align:center}
.notfound .code{font-family:var(--font-display);font-size:clamp(6rem,20vw,12rem);font-weight:700;line-height:1;background:linear-gradient(120deg,var(--blue),var(--sky));-webkit-background-clip:text;background-clip:text;color:transparent}
.notfound h1{margin:.8rem 0 .6rem}
.notfound p{color:var(--ink-soft);max-width:44ch;margin:0 auto 1.8rem}
.notfound .nf-actions{display:flex;justify-content:center;gap:.9rem;flex-wrap:wrap}
.notfound .nf-search{max-width:520px;margin:0 auto 2rem;display:flex;gap:.5rem}
.notfound .nf-search input{flex:1;padding:.8rem 1.1rem;border:1px solid var(--line-strong);border-radius:999px;font-size:.95rem;font-family:var(--font-body);outline:none}
.notfound .nf-search input:focus{border-color:var(--blue)}

/* ---- 页脚 ---- */
.site-footer{border-top:1px solid var(--line);background:var(--bg-tint);padding:3.5rem 0 2rem}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:2rem;margin-bottom:2.5rem}
.foot-brand p{color:var(--ink-soft);font-size:.9rem;max-width:30ch;margin-top:1rem}
.foot-col h4{font-size:.9rem;letter-spacing:.06em;color:var(--ink);margin-bottom:1.1rem;font-weight:600}
.foot-col ul{display:flex;flex-direction:column;gap:.6rem}
.foot-col a{font-size:.9rem;color:var(--ink-soft);transition:color .2s}
.foot-col a:hover{color:var(--blue)}
.foot-bottom{border-top:1px solid var(--line);padding-top:1.6rem;display:flex;flex-wrap:wrap;justify-content:space-between;gap:1rem;color:var(--muted);font-size:.82rem}
.foot-bottom ul{display:flex;gap:1.4rem;flex-wrap:wrap}
.foot-bottom a{color:var(--muted)}
.foot-bottom a:hover{color:var(--blue)}

/* ---- 滚动显现 ---- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---- 响应式 ---- */
@media (max-width:1020px){
  .hero-grid{grid-template-columns:1fr}
  .hero-visual{order:-1}
  .hero-metrics{grid-template-columns:repeat(2,1fr)}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .scen-grid{grid-template-columns:repeat(2,1fr)}
  .net-wrap{grid-template-columns:1fr}
  .plat-grid{grid-template-columns:repeat(2,1fr)}
  .price-grid{grid-template-columns:1fr;max-width:540px;margin:0 auto}
  .stats{grid-template-columns:repeat(2,1fr);gap:1.6rem}
  .dl-grid{grid-template-columns:1fr}
  .res-index{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .nav-links.open{display:flex;position:absolute;top:72px;left:0;right:0;flex-direction:column;align-items:flex-start;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:0 6%;box-shadow:0 20px 40px rgba(20,60,140,.12)}
  .nav-links.open a{padding:1rem 0;width:100%;border-bottom:1px solid var(--line)}
}
@media (max-width:620px){
  .features-grid,.scen-grid{grid-template-columns:1fr}
  .plat-grid{grid-template-columns:1fr 1fr}
  .res-index{grid-template-columns:1fr}
  .dev-feats{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr}
  .hero-actions .btn{flex:1 1 100%;justify-content:center}
  .step{grid-template-columns:52px 1fr;gap:1rem}
  .step-num{width:52px;height:52px;font-size:1.25rem}
  .step::before{left:25px}
}
/* ---- 软件截图占位（App 窗口） ---- */
.shot{position:relative;border-radius:18px;overflow:hidden}
.shot .shot-tag{position:absolute;top:14px;left:14px;z-index:3;background:rgba(255,255,255,.92);border:1px solid var(--line-strong);color:var(--muted);font-size:.72rem;padding:.22rem .6rem;border-radius:999px}
.appshot{background:#fff;border:1px solid var(--line-strong);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}
.appshot-bar{display:flex;align-items:center;gap:.5rem;padding:.7rem 1rem;background:#F4F8FF;border-bottom:1px solid var(--line)}
.appshot-dots{display:flex;gap:.35rem}
.appshot-dots i{width:10px;height:10px;border-radius:50%;background:#C9D9F0;display:block}
.appshot-dots i:first-child{background:var(--sky)}
.appshot-title{font-size:.8rem;color:var(--muted);margin-left:.4rem}
.appshot-body{display:flex;min-height:236px}
.appshot-side{width:158px;border-right:1px solid var(--line);padding:.9rem .7rem;display:flex;flex-direction:column;gap:.45rem;flex:none}
.appshot-side span{font-size:.74rem;color:var(--muted);padding:.38rem .55rem;border-radius:8px}
.appshot-side span.on{background:var(--blue-soft);color:var(--blue-strong);font-weight:600}
.appshot-main{flex:1;padding:1.1rem;display:flex;flex-direction:column;gap:.7rem}
.appshot-node{display:flex;align-items:center;justify-content:space-between;background:#F8FBFF;border:1px solid var(--line);border-radius:10px;padding:.55rem .8rem}
.appshot-node b{font-size:.8rem;font-weight:600}
.appshot-node span{font-size:.72rem;color:var(--muted)}
.appshot-status{display:flex;align-items:center;gap:.5rem;font-size:.8rem;color:var(--blue-strong);font-weight:600}
.appshot-status .dot{width:9px;height:9px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 4px var(--blue-soft)}
.connect-btn{background:var(--blue);color:#fff;border:0;border-radius:999px;padding:.72rem;font-weight:600;font-size:.9rem;cursor:default;text-align:center}
.connect-btn.ok{background:var(--blue-soft);color:var(--blue-strong)}

/* ---- 手机截图占位 ---- */
.phoneshot{width:100%;max-width:246px;margin:0 auto;border-radius:30px;border:7px solid #0B1E44;background:#fff;overflow:hidden;box-shadow:var(--shadow)}
.phone-notch{height:22px;background:#0B1E44;border-radius:0 0 14px 14px;width:58%;margin:0 auto}
.phone-app{padding:.85rem .9rem 1rem}
.phone-app .p-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:.7rem}
.phone-app .p-head b{font-size:.8rem}
.phone-app .p-head span{font-size:.7rem;color:var(--muted)}
.phone-app .connect-btn{padding:.6rem}
.phone-app .appshot-node{padding:.5rem .6rem}
.phone-app .appshot-node b{font-size:.74rem}
.phone-app .appshot-node span{font-size:.66rem}

/* ---- 左文右图 hero ---- */
.split-hero{display:grid;grid-template-columns:1fr 1fr;gap:3.5rem;align-items:center}
@media (max-width:1020px){.split-hero{grid-template-columns:1fr;gap:2.2rem}}

/* ---- 返回顶部 ---- */
.backtotop{
  position:fixed;right:22px;bottom:26px;z-index:80;
  width:48px;height:48px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--blue);color:#fff;border:0;cursor:pointer;
  box-shadow:0 10px 26px rgba(10,108,255,.4);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s,transform .3s,visibility .3s,background .2s;
}
.backtotop.show{opacity:1;visibility:visible;transform:none}
.backtotop:hover{background:var(--blue-strong)}
@media (max-width:620px){.backtotop{right:16px;bottom:18px;width:44px;height:44px}}

/* ---- 子下载页平台徽标 ---- */
.dev-head-row{display:flex;align-items:center;gap:1.1rem;flex-wrap:wrap}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{transition-duration:.01ms!important}
  .net-orb *{animation:none!important}
  .backtotop{transition:none}
}

/* ---- 品牌 logo 图片 ---- */
.brand-logo{height:36px;width:auto;display:block}
@media (max-width:620px){.brand-logo{height:30px}}

/* ---- hero 首屏真实产品图 ---- */
.hero-shot{width:100%;height:auto;display:block;}