/* =============================================
   COLD SYSTEMS — 冷系统终端风
   深海军蓝 × 电子青 × 数据终端排
   ============================================= */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --ink:       #020c18;
  --ink-2:     #041525;
  --ink-3:     #071e30;
  --panel:     rgba(4,21,37,0.85);
  --panel-h:   rgba(6,28,48,0.95);
  --cyan:      #00d8e8;
  --cyan-dim:  rgba(0,216,232,0.10);
  --cyan-mid:  rgba(0,216,232,0.22);
  --cyan-line: rgba(0,216,232,0.35);
  --blue:      #1a6aff;
  --blue-dim:  rgba(26,106,255,0.12);
  --ice:       #c8e8f4;
  --ice-dim:   #7aa8c0;
  --muted:     #3d6478;
  --border:    rgba(0,216,232,0.12);
  --border-h:  rgba(0,216,232,0.35);
  --font-ui:   "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-mono: "SF Mono","Cascadia Mono","Consolas","Courier New",monospace;
  --nh:        64px;
  --mw:        1120px;
  --r:         6px;
}

html{scroll-behavior:smooth}
body{
  font-family:var(--font-ui);
  background:var(--ink);
  color:var(--ice);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* 点阵背景 */
body::before{
  content:'';
  position:fixed;inset:0;
  background-image:
    radial-gradient(circle, rgba(0,216,232,0.07) 1px, transparent 1px);
  background-size:32px 32px;
  pointer-events:none;
  z-index:0;
}

/* 顶部扫描光 */
body::after{
  content:'';
  position:fixed;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--cyan),transparent);
  animation:scan 6s ease-in-out infinite;
  z-index:200;
  opacity:0.6;
}
@keyframes scan{
  0%,100%{top:0;opacity:0}
  10%{opacity:.7}
  90%{opacity:.3}
  95%{top:100vh;opacity:0}
}

a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}

.wrap{max-width:var(--mw);margin:0 auto;padding:0 28px;width:100%}

/* 数据标签 */
.sys-tag{
  display:inline-flex;align-items:center;gap:7px;
  font-family:var(--font-mono);
  font-size:10px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--cyan);
  padding:4px 10px;
  border:1px solid var(--border-h);
  border-radius:2px;
  background:var(--cyan-dim);
  margin-bottom:20px;
}
.sys-tag::before{
  content:'';width:5px;height:5px;
  background:var(--cyan);border-radius:50%;
  animation:blink 1.6s step-end infinite;
}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}

/* 章节标签 */
.sec-label{
  font-family:var(--font-mono);
  font-size:10px;letter-spacing:.2em;
  color:var(--muted);
  text-transform:uppercase;
  margin-bottom:10px;
  display:flex;align-items:center;gap:8px;
}
.sec-label::before{
  content:'//';
  color:var(--cyan);
  font-family:var(--font-mono);
}

.sec-title{
  font-size:clamp(1.4rem,3vw,2rem);
  font-weight:700;
  color:var(--ice);
  line-height:1.25;
  margin-bottom:14px;
  letter-spacing:-.02em;
}
.sec-desc{
  font-size:.9rem;color:var(--ice-dim);
  max-width:580px;line-height:1.8;
  margin-bottom:48px;
}

.sec{padding:88px 0;position:relative}

/* 分隔线 */
.rule{
  height:1px;
  background:linear-gradient(90deg,transparent,var(--border-h),transparent);
}

/* =============================================
   导航
   ============================================= */
header{
  position:fixed;top:0;left:0;right:0;
  height:var(--nh);z-index:100;
  background:rgba(2,12,24,0.92);
  backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);
  border-bottom:1px solid var(--border);
}
/* 顶部青色细线 */
header::before{
  content:'';
  position:absolute;top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent 0%,var(--cyan) 50%,transparent 100%);
  opacity:.5;
}
.nav-wrap{
  display:flex;align-items:center;justify-content:space-between;
  height:100%;max-width:var(--mw);margin:0 auto;padding:0 28px;
}
.logo{
  display:flex;align-items:center;gap:10px;
  font-size:.95rem;font-weight:700;letter-spacing:.05em;
  color:var(--ice);
}
.logo-mark{
  width:30px;height:30px;
  border:1.5px solid var(--cyan);
  border-radius:4px;
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;
  position:relative;
  overflow:hidden;
}
.logo-mark img{width:100%;height:100%;object-fit:contain;padding:3px}
.logo-mark::after{
  content:'';
  position:absolute;inset:0;
  background:linear-gradient(135deg,var(--cyan-dim),transparent);
}
.logo-sub{
  font-family:var(--font-mono);
  font-size:.65rem;color:var(--cyan);
  letter-spacing:.15em;
  display:block;margin-top:1px;
}
.nav-links{display:flex;align-items:center;gap:0}
.nav-links a{
  padding:8px 16px;
  font-size:.82rem;color:var(--ice-dim);
  letter-spacing:.02em;
  transition:color .2s;
  position:relative;
}
.nav-links a::after{
  content:'';
  position:absolute;bottom:0;left:50%;right:50%;
  height:1px;background:var(--cyan);
  transition:left .2s,right .2s;
}
.nav-links a:hover{color:var(--ice)}
.nav-links a:hover::after{left:16px;right:16px}
.nav-cta{
  font-size:.82rem;font-family:var(--font-mono);
  letter-spacing:.08em;
  padding:8px 20px;
  background:transparent;
  border:1px solid var(--cyan-line);
  color:var(--cyan);
  border-radius:var(--r);
  transition:background .2s,box-shadow .2s;
  white-space:nowrap;
  display:inline-flex;align-items:center;gap:6px;
}
.nav-cta::before{content:'›';font-size:1rem}
.nav-cta:hover{background:var(--cyan-dim);box-shadow:0 0 16px rgba(0,216,232,.15)}
.mbtn{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:36px;height:36px;background:none;border:none;cursor:pointer;padding:6px;
}
.mbtn span{display:block;width:100%;height:1.5px;background:var(--cyan);transition:transform .25s,opacity .25s}
.mbtn.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.mbtn.open span:nth-child(2){opacity:0}
.mbtn.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
#navM{
  display:none;flex-direction:column;
  background:rgba(2,12,24,.98);
  border-top:1px solid var(--border);
}
#navM.open{display:flex}
#navM a{
  padding:14px 28px;font-size:.88rem;color:var(--ice-dim);
  border-bottom:1px solid var(--border);
  transition:color .2s,background .2s;
}
#navM a:hover{color:var(--cyan);background:var(--cyan-dim)}
#navM a:last-child{border-bottom:none}

/* =============================================
   首屏 HERO
   ============================================= */
#hero{
  min-height:100vh;
  display:flex;align-items:center;
  padding-top:var(--nh);
  position:relative;overflow:hidden;
}
/* 坐标网格 */
.hero-grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size:80px 80px;
  mask-image:radial-gradient(ellipse 80% 80% at 60% 50%, black 30%, transparent 80%);
  -webkit-mask-image:radial-gradient(ellipse 80% 80% at 60% 50%, black 30%, transparent 80%);
}
.hero-img-wrap{
  position:absolute;right:0;top:0;bottom:0;width:52%;
}
.hero-img-wrap img{width:100%;height:100%;object-fit:cover;object-position:center}
.hero-img-wrap::before{
  content:'';position:absolute;inset:0;z-index:1;
  background:linear-gradient(90deg, var(--ink) 0%, rgba(2,12,24,.6) 60%, rgba(2,12,24,.2) 100%);
}
.hero-img-wrap::after{
  content:'';position:absolute;inset:0;z-index:2;
  background:linear-gradient(180deg, rgba(0,216,232,.05) 0%, transparent 60%);
}
/* 坐标角标 */
.hero-corner{
  position:absolute;
  font-family:var(--font-mono);
  font-size:9px;color:var(--muted);
  letter-spacing:.1em;
  pointer-events:none;
}
.hero-corner.tl{top:calc(var(--nh) + 20px);left:28px}
.hero-corner.tr{top:calc(var(--nh) + 20px);right:28px;text-align:right}
.hero-corner.bl{bottom:28px;left:28px}
.hero-corner.br{bottom:28px;right:28px;text-align:right}

.hero-content{position:relative;z-index:3;padding:80px 0;max-width:560px;margin-right:auto}
h1{
  font-size:clamp(2rem,5vw,3.2rem);
  font-weight:800;
  line-height:1.15;
  letter-spacing:-.04em;
  color:var(--ice);
  margin-bottom:22px;
}
h1 .hl{
  display:inline-block;
  color:var(--cyan);
  position:relative;
}
h1 .hl::after{
  content:'';
  position:absolute;bottom:-2px;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--blue));
}
.hero-desc{
  font-size:.95rem;color:var(--ice-dim);
  line-height:1.85;margin-bottom:40px;
  max-width:460px;
}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap}
.btn-cyan{
  padding:12px 28px;
  background:var(--cyan);
  color:var(--ink);
  font-weight:700;font-size:.88rem;
  font-family:var(--font-mono);
  letter-spacing:.05em;
  border-radius:var(--r);
  transition:box-shadow .2s,transform .15s;
  display:inline-block;
}
.btn-cyan:hover{box-shadow:0 0 28px rgba(0,216,232,.4);transform:translateY(-2px)}
.btn-ghost{
  padding:12px 28px;
  background:transparent;
  border:1px solid var(--border-h);
  color:var(--ice-dim);
  font-size:.88rem;border-radius:var(--r);
  transition:border-color .2s,color .2s,background .2s;
  display:inline-block;
}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);background:var(--cyan-dim)}
.center-cta{margin-top:28px;text-align:center}

/* 首屏指标条 */
.hero-stats{
  display:flex;gap:0;
  margin-top:52px;
  border-top:1px solid var(--border);
  padding-top:28px;
}
.hstat{
  flex:1;padding-right:24px;
  border-right:1px solid var(--border);
}
.hstat:last-child{border-right:none;padding-right:0;padding-left:24px}
.hstat:not(:first-child):not(:last-child){padding:0 24px}
.hstat-v{
  font-family:var(--font-mono);
  font-size:1.4rem;font-weight:700;
  color:var(--cyan);
  letter-spacing:-.02em;
}
.hstat-l{
  font-size:.78rem;color:var(--muted);
  margin-top:3px;letter-spacing:.02em;
}

/* 快速锚点 */
#qnav{
  background:rgba(2,12,24,.95);
  border-bottom:1px solid var(--border);
  position:sticky;top:var(--nh);z-index:90;
  overflow-x:auto;scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
#qnav::-webkit-scrollbar{display:none}
.qnav-inner{
  display:flex;max-width:var(--mw);margin:0 auto;
  padding:0 28px;white-space:nowrap;
}
.qnav-inner a{
  display:inline-flex;align-items:center;gap:6px;
  padding:11px 18px;
  font-family:var(--font-mono);
  font-size:.78rem;letter-spacing:.06em;
  color:var(--muted);
  border-bottom:2px solid transparent;
  transition:color .2s,border-color .2s;
}
.qnav-inner a:first-child::before{content:'01 '}
.qnav-inner a:nth-child(2)::before{content:'02 '}
.qnav-inner a:nth-child(3)::before{content:'03 '}
.qnav-inner a:nth-child(4)::before{content:'04 '}
.qnav-inner a:nth-child(5)::before{content:'05 '}
.qnav-inner a:nth-child(6)::before{content:'06 '}
.qnav-inner a:hover{color:var(--cyan);border-bottom-color:var(--cyan)}

/* =============================================
   经销入口模块
   ============================================= */
#entrance{background:linear-gradient(180deg,var(--ink) 0%,var(--ink-2) 100%)}

.entry-banner{
  position:relative;border-radius:var(--r);overflow:hidden;
  margin-bottom:52px;
  border:1px solid var(--border);
}
.entry-banner img{width:100%;height:260px;object-fit:cover;display:block}
.entry-banner::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(to right, rgba(2,12,24,.8) 0%, rgba(2,12,24,.2) 100%),
             linear-gradient(to top, var(--ink-2) 0%, transparent 40%);
}
.entry-banner-label{
  position:absolute;bottom:20px;left:24px;z-index:2;
  font-family:var(--font-mono);font-size:.72rem;
  letter-spacing:.15em;color:var(--cyan);
  text-transform:uppercase;
  display:flex;align-items:center;gap:8px;
}
.entry-banner-label::before{
  content:'';width:20px;height:1px;background:var(--cyan);display:block;
}

/* 左侧竖线卡片 */
.v-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.vcard{
  background:var(--panel);
  border:1px solid var(--border);
  border-left:3px solid var(--cyan-line);
  border-radius:var(--r);
  padding:28px 24px;
  transition:border-left-color .25s,background .25s,transform .2s;
  position:relative;
  overflow:hidden;
}
.vcard::before{
  content:'';
  position:absolute;top:0;right:0;
  width:60px;height:60px;
  background:radial-gradient(circle at top right, var(--cyan-dim), transparent 70%);
}
.vcard:hover{
  border-left-color:var(--cyan);
  background:var(--panel-h);
  transform:translateX(3px);
}
.vcard-num{
  font-family:var(--font-mono);
  font-size:.72rem;color:var(--muted);
  letter-spacing:.12em;
  margin-bottom:14px;
}
.vcard h3{
  font-size:.95rem;font-weight:600;
  color:var(--ice);margin-bottom:10px;
  line-height:1.4;
}
.vcard p{font-size:.85rem;color:var(--ice-dim);line-height:1.75}

/* =============================================
   新手路径
   ============================================= */
#onboard{background:var(--ink-2)}

.path-track{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:0;
  position:relative;
  margin-top:48px;
}
.path-track::after{
  content:'';
  position:absolute;
  top:28px;
  left:calc(100% / 6);
  right:calc(100% / 6);
  height:1px;
  background:linear-gradient(90deg,var(--cyan-line) 0%,var(--border) 100%);
  pointer-events:none;
}
.path-step{
  padding:0 28px;
  text-align:center;
  position:relative;
}
.path-step:first-child{padding-left:0}
.path-step:last-child{padding-right:0}
.step-node{
  width:56px;height:56px;
  border:1.5px solid var(--cyan);
  background:var(--ink-2);
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 24px;
  font-family:var(--font-mono);
  font-size:.85rem;font-weight:700;
  color:var(--cyan);
  position:relative;z-index:1;
  transition:background .2s,box-shadow .2s;
}
.path-step:hover .step-node{
  background:var(--cyan-dim);
  box-shadow:0 0 20px rgba(0,216,232,.2);
}
.path-step h3{
  font-size:.92rem;font-weight:600;
  color:var(--ice);margin-bottom:10px;
}
.path-step p{font-size:.83rem;color:var(--ice-dim);line-height:1.75}

/* =============================================
   产品/型号判断
   ============================================= */
#models{background:var(--ink)}

.model-grid{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:20px;margin-top:48px;
}
.model-card{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--r);
  overflow:hidden;
  transition:border-color .25s,transform .2s;
  position:relative;
}
.model-card:hover{border-color:var(--cyan-line);transform:translateY(-4px)}
/* 角标装饰 */
.model-card::before{
  content:'';
  position:absolute;top:0;left:0;
  width:0;height:0;
  border-style:solid;
  border-width:20px 20px 0 0;
  border-color:var(--cyan-line) transparent transparent transparent;
  z-index:2;
  transition:border-color .25s;
}
.model-card:hover::before{border-color:var(--cyan) transparent transparent transparent}

.model-img{
  height:190px;
  background:linear-gradient(135deg,var(--ink-3),var(--ink-2));
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;padding:20px;
  position:relative;
}
.model-img::after{
  content:'';position:absolute;inset:0;
  background:radial-gradient(circle at 50% 50%,rgba(0,216,232,.04),transparent 70%);
}
.model-img img{
  max-height:100%;object-fit:contain;
  transition:transform .3s;
  position:relative;z-index:1;
}
.model-card:hover .model-img img{transform:scale(1.06)}

.model-body{padding:22px}
.model-status{
  font-family:var(--font-mono);
  font-size:.7rem;letter-spacing:.12em;
  color:var(--cyan);
  text-transform:uppercase;
  margin-bottom:8px;
  display:flex;align-items:center;gap:6px;
}
.model-status::before{
  content:'';width:5px;height:5px;
  background:var(--cyan);border-radius:50%;
  flex-shrink:0;
}
.model-card h3{font-size:.95rem;font-weight:600;color:var(--ice);margin-bottom:8px}
.model-card p{font-size:.83rem;color:var(--ice-dim);line-height:1.7}

/* 对比说明条 */
.compare-bar{
  display:grid;grid-template-columns:repeat(2,1fr);
  gap:16px;margin-top:32px;
}
.compare-item{
  background:var(--blue-dim);
  border:1px solid rgba(26,106,255,.2);
  border-radius:var(--r);
  padding:18px 20px;
  display:flex;gap:14px;align-items:flex-start;
}
.ci-icon{
  width:32px;height:32px;flex-shrink:0;
  border:1px solid rgba(26,106,255,.3);
  border-radius:4px;
  display:flex;align-items:center;justify-content:center;
  font-size:.9rem;
  background:rgba(26,106,255,.08);
}
.compare-item h4{font-size:.88rem;font-weight:600;color:var(--ice);margin-bottom:5px}
.compare-item p{font-size:.82rem;color:var(--ice-dim);line-height:1.65}

/* =============================================
   FAQ
   ============================================= */
#faq{background:var(--ink-2)}

.faq-cols{
  display:grid;grid-template-columns:repeat(2,1fr);
  gap:10px;margin-top:40px;
}
.fi{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--r);
  overflow:hidden;
  transition:border-color .2s;
}
.fi.open{border-color:var(--cyan-line)}
.fq{
  width:100%;text-align:left;
  padding:16px 20px;
  background:none;border:none;cursor:pointer;
  display:flex;align-items:flex-start;justify-content:space-between;gap:12px;
  color:var(--ice);font-size:.87rem;font-weight:500;
  font-family:var(--font-ui);line-height:1.5;
  transition:color .2s;
}
.fq:hover{color:var(--cyan)}
.fq .faq-q{display:block;flex:1;line-height:1.45}
.fq-num{
  font-family:var(--font-mono);
  font-size:.7rem;color:var(--muted);
  flex-shrink:0;padding-top:2px;
  letter-spacing:.05em;
}
.fq-ico{
  width:18px;height:18px;flex-shrink:0;
  border:1px solid var(--border-h);border-radius:2px;
  display:flex;align-items:center;justify-content:center;
  font-size:12px;color:var(--cyan);
  transition:transform .2s,background .2s;
  margin-top:1px;
}
.fi.open .fq-ico{transform:rotate(45deg);background:var(--cyan-dim)}
.fa{
  display:none;
  padding:0 20px 16px 46px;
  font-size:.84rem;color:var(--ice-dim);line-height:1.8;
  border-top:1px solid var(--border);
}
.fi.open .fa{display:block}

/* =============================================
   风险提醒
   ============================================= */
#risk{background:var(--ink)}

.risk-grid{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:16px;margin-top:40px;
}
.ri{
  background:rgba(255,80,80,.03);
  border:1px solid rgba(255,100,100,.12);
  border-top:2px solid rgba(255,100,100,.25);
  border-radius:var(--r);
  padding:22px;
}
.ri-head{
  display:flex;align-items:center;gap:10px;
  margin-bottom:10px;
}
.ri-dot{width:7px;height:7px;background:#ff6060;border-radius:50%;flex-shrink:0}
.ri h4{font-size:.88rem;font-weight:600;color:var(--ice)}
.ri p{font-size:.82rem;color:var(--ice-dim);line-height:1.7}

/* =============================================
   CTA 转化
   ============================================= */
#cta{
  background:var(--ink-2);
  padding:88px 0;
  position:relative;overflow:hidden;
}
#cta::before{
  content:'';
  position:absolute;top:50%;left:50%;
  transform:translate(-50%,-50%);
  width:600px;height:300px;
  background:radial-gradient(ellipse, rgba(0,216,232,.06) 0%, transparent 70%);
  pointer-events:none;
}
.cta-inner{text-align:center;position:relative;z-index:1}
.cta-inner h2{
  font-size:clamp(1.4rem,3vw,2rem);
  font-weight:700;color:var(--ice);
  margin-bottom:12px;letter-spacing:-.02em;
}
.cta-inner p{color:var(--ice-dim);font-size:.92rem;margin-bottom:36px}
.cta-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
/* 系统线装饰 */
.cta-inner::before,.cta-inner::after{
  content:'';display:block;
  height:1px;width:120px;margin:0 auto;
  background:linear-gradient(90deg,transparent,var(--cyan-line),transparent);
}
.cta-inner::before{margin-bottom:32px}
.cta-inner::after{margin-top:32px}

/* =============================================
   页脚
   ============================================= */
footer{
  border-top:1px solid var(--border);
  padding:36px 0;
  background:rgba(2,8,16,.98);
}
.ft-wrap{
  max-width:var(--mw);margin:0 auto;padding:0 28px;
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;flex-wrap:wrap;
}
.ft-brand{
  display:flex;align-items:center;gap:10px;
  font-size:.82rem;color:var(--muted);
}
.ft-brand-icon{
  width:24px;height:24px;
  border:1px solid var(--border-h);border-radius:3px;
  overflow:hidden;
}
.ft-brand-icon img{width:100%;height:100%;object-fit:contain;padding:2px}
.ft-links{display:flex;gap:20px;flex-wrap:wrap}
.ft-links a{font-size:.8rem;color:var(--muted);transition:color .2s}
.ft-links a:hover{color:var(--cyan)}
.ft-copy{font-size:.78rem;color:var(--muted)}

/* 回到顶部 */
#bt{
  position:fixed;right:22px;bottom:78px;
  width:40px;height:40px;
  background:var(--ink-3);
  border:1px solid var(--border-h);
  border-radius:var(--r);
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;
  opacity:0;visibility:hidden;
  transition:opacity .3s,visibility .3s,transform .2s;
  z-index:50;
  font-family:var(--font-mono);font-size:.8rem;color:var(--cyan);
}
#bt.show{opacity:1;visibility:visible}
#bt:hover{transform:translateY(-3px);box-shadow:0 0 12px rgba(0,216,232,.2)}

/* 移动端悬浮 */
.fbar{
  display:none;
  position:fixed;bottom:0;left:0;right:0;
  z-index:80;padding:10px 16px;
  background:rgba(2,12,24,.97);
  border-top:1px solid var(--border);
  backdrop-filter:blur(16px);
}
.fbar a{
  display:block;text-align:center;
  padding:12px;
  background:var(--cyan);
  color:var(--ink);
  font-weight:700;font-size:.88rem;
  font-family:var(--font-mono);
  letter-spacing:.05em;
  border-radius:var(--r);
}

/* =============================================
   响应式
   ============================================= */
@media(max-width:960px){
  .v-cards{grid-template-columns:1fr}
  .path-track{grid-template-columns:1fr;gap:24px}
  .path-track::after{display:none}
  .path-step{text-align:left;display:flex;gap:18px;align-items:flex-start;padding:0}
  .step-node{margin:0;flex-shrink:0}
  .model-grid{grid-template-columns:1fr}
  .faq-cols{grid-template-columns:1fr}
  .risk-grid{grid-template-columns:1fr}
  .compare-bar{grid-template-columns:1fr}
  .hero-stats{flex-wrap:wrap}
  .hstat{min-width:40%;border-right:none;padding:12px 0;border-bottom:1px solid var(--border)}
  .hstat:last-child{border-bottom:none}
}
@media(max-width:768px){
  :root{--nh:56px}
  .nav-links,.nav-cta{display:none}
  .mbtn{display:flex}
  .hero-img-wrap{opacity:.25}
  h1{font-size:2rem}
  .sec{padding:60px 0}
  .hero-content{padding:48px 0}
  .fbar{display:block}
  .ft-wrap{flex-direction:column;align-items:flex-start;gap:14px}
  #bt{bottom:68px}
  .hero-corner.tr,.hero-corner.br{display:none}
}
@media(max-width:480px){
  .hero-btns{flex-direction:column}
  .cta-btns{flex-direction:column}
  .btn-cyan,.btn-ghost{text-align:center}
  .qnav-inner a{font-size:.72rem;padding:10px 12px}
}

/* 入场动画 */
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.hero-content>*{animation:fadeUp .6s ease both}
.hero-content .sys-tag{animation-delay:.1s}
.hero-content h1{animation-delay:.2s}
.hero-content .hero-desc{animation-delay:.3s}
.hero-content .hero-btns{animation-delay:.4s}
.hero-content .hero-stats{animation-delay:.5s}