/* ===== Reset & Base ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:"PingFang SC","Microsoft YaHei",-apple-system,"system-ui","Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,"Fira Sans","Droid Sans","Helvetica Neue",sans-serif;
  color:#191A23;background:#fff;line-height:1.6;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;display:block}
button{border:none;background:none;cursor:pointer;font:inherit}

/* ===== CSS Variables ===== */
:root{
  --brand:#005bac;
  --brand-light:#2f86d6;
  --brand-bg:rgba(0,91,172,0.08);
  --text-primary:#191A23;
  --text-secondary:rgba(0,0,0,0.6);
  --text-tertiary:rgba(0,0,0,0.65);
  --text-list:rgba(0,0,0,0.75);
  --bg-white:#fff;
  --bg-light:#F4F5F5;
  --bg-lighter:#F8F9FA;
  --bg-cta:#F4F4F4;
  --border-light:rgba(200,200,200,0.4);
  --shadow-card:0 2px 12px rgba(0,0,0,0.06);
  --shadow-demo:0 24px 48px -12px rgba(0,0,0,0.12);
  --radius-sm:4px;
  --radius-md:8px;
  --radius-lg:12px;
  --radius-xl:16px;
  --radius-top:22.6px 22.6px 0 0;
  --max-width:1200px;
  --header-h:56px;
}

/* ===== Header ===== */
.header{
  position:fixed;top:0;left:0;right:0;z-index:1100;
  background:rgba(255,255,255,0.85);
  backdrop-filter:blur(40px);-webkit-backdrop-filter:blur(40px);
  height:var(--header-h);
}
.header-inner{
  max-width:var(--max-width);margin:0 auto;padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;height:100%;
}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px}
.logo-img{
  height:36px;width:auto;display:block;
  mix-blend-mode:multiply; /* 融合 logo 浅色底与导航栏背景 */
  transition:opacity .2s;
}
.logo:hover .logo-img{opacity:.85}
.nav-desktop{display:flex;gap:28px}
.nav-desktop a{font-size:14px;font-weight:700;color:var(--text-primary);transition:color .2s}
.nav-desktop a:hover{color:var(--brand)}
.header-actions{display:flex;gap:12px;align-items:center}
.btn-contact{
  font-size:13px;font-weight:600;color:var(--brand);
  border:1px solid var(--brand);border-radius:var(--radius-sm);
  padding:6px 16px;transition:all .2s;
}
.btn-contact:hover{background:var(--brand);color:#fff}
.hamburger{display:none;flex-direction:column;gap:5px;padding:4px}
.hamburger span{display:block;width:20px;height:2px;background:var(--text-primary);border-radius:2px;transition:all .3s}

/* Mobile Menu */
.mobile-menu{
  position:fixed;top:var(--header-h);left:0;right:0;bottom:0;
  background:rgba(255,255,255,0.95);backdrop-filter:blur(20px);
  z-index:1099;display:none;flex-direction:column;align-items:center;
  justify-content:center;gap:32px;
}
.mobile-menu.open{display:flex}
.mobile-nav a{font-size:18px;font-weight:500;color:#4C4F6B}

/* ===== Hero ===== */
.hero{
  position:relative;min-height:480px;display:flex;align-items:center;
  justify-content:center;padding:calc(var(--header-h) + 60px) 24px 60px;
  background:var(--bg-white);overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(ellipse 800px 600px at 50% 40%, rgba(0,91,172,0.06) 0%, transparent 70%),
    radial-gradient(ellipse 400px 400px at 20% 80%, rgba(0,91,172,0.04) 0%, transparent 60%),
    radial-gradient(ellipse 400px 400px at 80% 20%, rgba(47,134,214,0.04) 0%, transparent 60%);
  pointer-events:none;
}
.hero-content{position:relative;text-align:center;max-width:680px}
.hero-title{
  font-size:36px;font-weight:700;color:var(--text-primary);
  line-height:1.3;margin-bottom:20px;display:flex;flex-wrap:wrap;
  align-items:center;justify-content:center;gap:8px;
}
.hero-prefix,.hero-suffix{display:inline}
.hero-rotate-wrapper{
  display:inline-block;position:relative;min-width:152px;
  color:var(--brand);overflow:hidden;height:48px;
}
.hero-rotate-text{
  display:inline-block;position:absolute;left:0;right:0;top:0;
  text-align:center;transition:all .5s cubic-bezier(.4,0,.2,1);
}
.hero-desc{
  font-size:15px;font-weight:400;color:var(--text-secondary);
  line-height:1.8;margin-bottom:36px;max-width:560px;margin-left:auto;margin-right:auto;
}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand);color:#fff;border-radius:var(--radius-sm);
  padding:12px 32px;font-size:15px;font-weight:600;
  transition:all .25s;cursor:pointer;border:none;
}
.btn-primary:hover{background:#004a8c;transform:translateY(-1px);box-shadow:0 4px 16px rgba(0,91,172,0.3)}
.btn-outline{
  display:inline-flex;align-items:center;gap:8px;
  background:transparent;color:var(--text-primary);
  border:1px solid var(--brand);border-radius:var(--radius-sm);
  padding:12px 32px;font-size:15px;font-weight:700;transition:all .25s;
}
.btn-outline:hover{background:var(--brand-bg);color:var(--brand)}
.btn-large{padding:14px 40px;font-size:16px}

/* Download Dropdown */
.btn-download-wrap{position:relative;display:inline-block}
.download-dropdown{
  position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%) translateY(-8px);
  background:#fff;border-radius:var(--radius-md);padding:6px;
  box-shadow:0 8px 32px rgba(0,0,0,0.12);min-width:180px;
  opacity:0;visibility:hidden;transition:all .25s;z-index:100;
}
.download-dropdown.open{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.download-item{
  display:block;padding:10px 16px;border-radius:6px;font-size:14px;
  color:var(--text-primary);transition:background .15s;white-space:nowrap;
}
.download-item:hover{background:var(--bg-light)}

/* ===== Demo Section ===== */
.demo-section{
  padding:24px 16px 60px;display:flex;justify-content:center;
  background:var(--bg-white);
}
.demo-card{
  width:100%;max-width:800px;background:#fff;border-radius:var(--radius-md);
  border:1px solid var(--border-light);box-shadow:var(--shadow-demo);
  overflow:hidden;animation:compact-rise-in .5s cubic-bezier(.16,1,.3,1) both;
}
.demo-card-inner{display:flex;flex-direction:column}
.demo-header{
  display:flex;align-items:center;gap:12px;padding:12px 16px;
  border-bottom:1px solid rgba(0,0,0,0.06);
}
.demo-dots{display:flex;gap:6px}
.dot{width:10px;height:10px;border-radius:50%}
.dot-red{background:#FF5F57}
.dot-yellow{background:#FFBD2E}
.dot-green{background:#28CA42}
.demo-title{font-size:13px;color:var(--text-secondary);font-weight:500}
.demo-body{display:flex;min-height:360px}
.demo-sidebar{
  width:180px;border-right:1px solid rgba(0,0,0,0.06);
  padding:12px 0;flex-shrink:0;
}
.demo-sidebar-item{
  display:flex;align-items:center;gap:8px;padding:10px 16px;
  font-size:13px;color:var(--text-secondary);cursor:pointer;transition:all .15s;
}
.demo-sidebar-item:hover{background:var(--bg-light)}
.demo-sidebar-item.active{color:var(--brand);background:var(--brand-bg);font-weight:600}
.demo-main{flex:1;padding:20px}
.demo-chat{display:flex;flex-direction:column;gap:16px}
.demo-msg{display:flex;gap:10px}
.demo-msg-user{justify-content:flex-end}
.demo-avatar{
  width:32px;height:32px;border-radius:50%;display:flex;align-items:center;
  justify-content:center;font-size:12px;font-weight:600;flex-shrink:0;
}
.user-avatar{background:var(--bg-light);color:var(--text-secondary)}
.ai-avatar{background:var(--brand);color:#fff}
.demo-bubble{
  max-width:400px;padding:12px 16px;border-radius:12px;font-size:13px;line-height:1.7;
}
.user-bubble{background:var(--brand);color:#fff;border-bottom-right-radius:4px}
.ai-bubble{background:var(--bg-light);color:var(--text-primary);border-bottom-left-radius:4px}
.demo-progress-list{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.demo-progress-item{
  display:flex;align-items:center;gap:8px;font-size:12px;
  padding:6px 10px;border-radius:6px;background:rgba(255,255,255,0.6);
}
.demo-progress-item.done{color:#004a8c}
.demo-progress-item.done .step-icon{font-weight:700}
.demo-progress-item .step-icon{flex-shrink:0}
/* 模拟操作动画状态（JS 添加 .js-demo 后生效，无 JS 时静态全显示） */
.demo-card.js-demo .demo-msg{opacity:0;transform:translateY(10px);transition:opacity .4s ease,transform .4s ease}
.demo-card.js-demo .demo-msg.show{opacity:1;transform:none}
.demo-card.js-demo .demo-progress-item{opacity:0;transform:translateY(6px);transition:opacity .3s ease,transform .3s ease}
.demo-card.js-demo .demo-progress-item.show{opacity:1;transform:none}
.demo-card.js-demo .demo-result{opacity:0;transform:translateY(6px);transition:opacity .4s ease,transform .4s ease}
.demo-card.js-demo .demo-result.show{opacity:1;transform:none}
.typing-cursor{display:none;margin-left:2px;font-weight:400;animation:cursor-blink 1s steps(1) infinite}
@keyframes cursor-blink{50%{opacity:0}}
.check-icon{font-weight:700}
.spin-icon{display:inline-block;animation:spin 1.5s linear infinite}
.demo-result{
  margin-top:12px;padding:10px 12px;border-radius:8px;
  background:rgba(0,91,172,0.08);font-size:12px;
}
.demo-result p{margin-bottom:2px}

/* ===== Scenes / Products Section ===== */
.scenes-section{
  background:var(--bg-white);padding:0;
}
.scenes-inner{
  background:var(--bg-light);border-radius:var(--radius-top);
  padding:60px 24px 80px;max-width:var(--max-width);margin:0 auto;
}
.scenes-header{text-align:center;margin-bottom:40px}
.section-title{font-size:28px;font-weight:700;color:var(--text-primary);margin-bottom:12px}
.section-subtitle{font-size:14px;font-weight:500;color:var(--text-secondary);line-height:1.8;max-width:560px;margin:0 auto}
.scenes-tabs{
  display:flex;gap:0;background:rgba(194,196,211,0.2);
  border-radius:6px;padding:4px;max-width:480px;margin:0 auto 40px;
}
.scene-tab{
  flex:1;padding:10px 16px;font-size:14px;font-weight:500;
  border-radius:3px;color:var(--text-primary);transition:all .25s;cursor:pointer;
}
.scene-tab.active{background:var(--brand);color:#fff;font-weight:600}
.scenes-content{position:relative}
.scene-panel{
  display:none;gap:40px;
  grid-template-columns:1fr 1fr;align-items:center;
}
.scene-panel.active{display:grid}
.scene-info{padding:20px 0}
.scene-title{font-size:28px;font-weight:700;color:var(--text-primary);margin-bottom:8px}
.scene-subtitle{font-size:16px;font-weight:600;color:var(--brand);margin-bottom:20px}
.scene-features{display:flex;flex-direction:column;gap:12px}
.scene-features li{
  font-size:14px;line-height:1.8;color:var(--text-primary);
  padding-left:20px;position:relative;
}
.scene-features li::before{
  content:"";position:absolute;left:0;top:10px;
  width:8px;height:8px;border-radius:50%;background:var(--brand);
}
.scene-visual{display:flex;justify-content:center}
.scene-card-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:16px;width:100%;
}
.scene-stat-card{
  background:#fff;border-radius:var(--radius-lg);padding:24px 20px;
  text-align:center;border:1px solid rgba(0,0,0,0.06);
  transition:all .3s;
}
.scene-stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card)}
.scene-stat-card.highlight{border-color:var(--brand);background:rgba(0,91,172,0.03)}
.stat-number{font-size:24px;font-weight:700;color:var(--text-primary);margin-bottom:6px}
.stat-number span{color:var(--brand)}
.stat-label{font-size:12px;color:var(--text-secondary)}

/* ===== Orbit / Ecosystem Section ===== */
.orbit-section{padding:80px 0;background:var(--bg-white)}
.orbit-inner{max-width:var(--max-width);margin:0 auto;text-align:center}
.section-title-dark{font-size:28px;font-weight:700;color:#000;margin-bottom:12px}
.orbit-desc{font-size:14px;color:var(--text-secondary);max-width:560px;margin:0 auto 48px;line-height:1.8}
.orbit-container{
  width:640px;height:640px;max-width:100%;margin:0 auto 48px;position:relative;
}
.orbit-bg-circle{
  position:absolute;left:50%;top:50%;width:67%;height:67%;
  transform:translate(-50%,-50%);border-radius:50%;
  background:radial-gradient(circle,rgba(0,91,172,0.07) 0%,rgba(0,91,172,0.035) 55%,rgba(0,91,172,0) 72%);
}
.orbit-dashed-ring{
  position:absolute;left:50%;top:50%;width:84%;height:84%;
  transform:translate(-50%,-50%);border-radius:50%;
  border:1.5px dashed rgba(0,91,172,0.16);
}
.orbit-logo-tile{
  position:absolute;left:50%;top:50%;width:25.6%;height:25.6%;
  transform:translate(-50%,-50%);border-radius:26%;z-index:10;
  background:linear-gradient(135deg,#005bac,#2f86d6);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 16px 48px rgba(0,91,172,0.35);
}
.orbit-logo-crop{width:64.5%;height:64.5%;overflow:hidden}
.orbit-logo-crop img{height:100%;width:auto;max-width:none;filter:brightness(0) invert(1)}
.orbit-track{
  position:absolute;left:50%;top:50%;width:75%;height:75%;
  /* 注意：旋转动画占用 transform，居中必须用负 margin（百分比相对容器宽度） */
  margin:-37.5% 0 0 -37.5%;border-radius:50%;
  border:1px solid rgba(0,91,172,0.15);
  animation:ecosystem-orbit-spin 60s linear infinite;
}
.orbit-item{position:absolute;transform:translate(-50%,-50%)}
.orbit-card{
  display:flex;align-items:center;gap:10px;
  padding:10px 26px 10px 12px;background:#fff;border-radius:999px;
  box-shadow:0 6px 24px rgba(0,91,172,0.10);
  font-size:15px;font-weight:700;color:var(--text-primary);white-space:nowrap;
  animation:ecosystem-item-counter-spin 60s linear infinite;
  transition:box-shadow .3s;
}
.orbit-item:hover .orbit-card{box-shadow:0 10px 32px rgba(0,91,172,0.22)}
.orbit-paused .orbit-track,
.orbit-paused .orbit-card{animation-play-state:paused}
.orbit-ico{
  width:40px;height:40px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;color:#fff;
}
.orbit-ico svg{width:20px;height:20px}
.ico-1{background:#005bac}.ico-2{background:#7c5cff}.ico-3{background:#ff8a00}.ico-4{background:#00a870}
.ico-5{background:#00b8d9}.ico-6{background:#f5455c}.ico-7{background:#2f86d6}.ico-8{background:#6b7cff}
/* Position 8 items around the circle */
.orbit-item:nth-child(1){left:50%;top:0}
.orbit-item:nth-child(2){left:85.4%;top:14.6%}
.orbit-item:nth-child(3){left:100%;top:50%}
.orbit-item:nth-child(4){left:85.4%;top:85.4%}
.orbit-item:nth-child(5){left:50%;top:100%}
.orbit-item:nth-child(6){left:14.6%;top:85.4%}
.orbit-item:nth-child(7){left:0;top:50%}
.orbit-item:nth-child(8){left:14.6%;top:14.6%}

.orbit-layers{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
  max-width:960px;margin:0 auto;
}
.orbit-layer-card{
  background:var(--bg-light);border-radius:var(--radius-lg);padding:24px 20px;
  text-align:left;transition:all .3s;border:1px solid transparent;
}
.orbit-layer-card:hover{border-color:var(--brand);background:#fff;box-shadow:var(--shadow-card)}
.layer-tag{
  display:inline-block;font-size:11px;font-weight:600;color:var(--brand);
  background:var(--brand-bg);padding:3px 10px;border-radius:var(--radius-sm);margin-bottom:10px;
}
.orbit-layer-card h4{font-size:15px;font-weight:700;margin-bottom:8px;color:var(--text-primary)}
.orbit-layer-card p{font-size:13px;color:var(--text-secondary);line-height:1.6}

/* ===== Partners Marquee ===== */
.partners-section{
  background:var(--bg-lighter);padding:40px 0;overflow:hidden;
}
.partners-inner{max-width:var(--max-width);margin:0 auto;text-align:center}
.partners-inner .section-title-dark{margin-bottom:24px}
.marquee-wrap{overflow:hidden;position:relative}
.marquee-wrap::before,.marquee-wrap::after{
  content:"";position:absolute;top:0;bottom:0;width:80px;z-index:2;pointer-events:none;
}
.marquee-wrap::before{left:0;background:linear-gradient(90deg,var(--bg-lighter),transparent)}
.marquee-wrap::after{right:0;background:linear-gradient(-90deg,var(--bg-lighter),transparent)}
.marquee-track{
  display:flex;gap:24px;width:max-content;
  animation:marquee-scroll 40s linear infinite;
}
.marquee-item{
  padding:12px 32px;background:#fff;border-radius:var(--radius-md);
  font-size:14px;font-weight:600;color:var(--text-secondary);
  white-space:nowrap;border:1px solid rgba(0,0,0,0.04);
  transition:all .2s;
}
.marquee-item:hover{color:var(--brand);border-color:var(--brand)}

/* ===== Cases Section ===== */
.cases-section{
  background:var(--bg-lighter);padding:80px 0;overflow:hidden;
}
.cases-inner{max-width:var(--max-width);margin:0 auto;text-align:center;padding:0 24px}
.cases-subtitle{font-size:15px;color:var(--text-secondary);margin-bottom:40px}
.cases-scroll-wrap{overflow:hidden;position:relative}
.cases-scroll-wrap::before,.cases-scroll-wrap::after{
  content:"";position:absolute;top:0;bottom:0;width:60px;z-index:2;pointer-events:none;
}
.cases-scroll-wrap::before{left:0;background:linear-gradient(90deg,var(--bg-lighter),transparent)}
.cases-scroll-wrap::after{right:0;background:linear-gradient(-90deg,var(--bg-lighter),transparent)}
.cases-track{
  display:flex;gap:20px;width:max-content;
  animation:marquee-scroll 60s linear infinite;
}
.cases-track:hover{animation-play-state:paused}
.case-card{
  width:320px;flex-shrink:0;background:#fff;border-radius:var(--radius-xl);
  padding:28px 24px;text-align:left;transition:all .3s;
  border:1px solid rgba(0,0,0,0.04);
}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card)}
.case-tag{
  display:inline-block;font-size:11px;font-weight:600;color:var(--brand);
  background:var(--brand-bg);padding:3px 10px;border-radius:var(--radius-sm);margin-bottom:12px;
}
.case-title{font-size:17px;font-weight:700;color:var(--text-primary);margin-bottom:10px}
.case-desc{font-size:13px;color:var(--text-secondary);line-height:1.7;margin-bottom:16px}
.case-metrics{display:flex;gap:16px;flex-wrap:wrap}
.case-metric{flex:1;min-width:70px}
.metric-value{font-size:20px;font-weight:700;color:var(--brand)}
.metric-label{font-size:11px;color:var(--text-secondary);margin-top:2px}

/* ===== App Scenarios ===== */
.app-scenarios-section{
  padding:80px 24px;background:var(--bg-white);
}
.app-inner{max-width:var(--max-width);margin:0 auto;text-align:center}
.app-subtitle{font-size:14px;color:var(--text-secondary);margin-bottom:40px}
.app-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}
.app-card{
  background:var(--bg-light);border-radius:var(--radius-lg);padding:28px 24px;
  text-align:left;transition:all .3s;border:1px solid transparent;
}
.app-card:hover{border-color:var(--brand);background:#fff;box-shadow:var(--shadow-card);transform:translateY(-2px)}
.app-icon{
  width:48px;height:48px;border-radius:12px;
  background:var(--brand-bg);display:flex;align-items:center;justify-content:center;
  margin-bottom:16px;color:var(--brand);
}
.app-card h4{font-size:15px;font-weight:700;margin-bottom:8px;color:var(--text-primary)}
.app-card p{font-size:13px;color:var(--text-secondary);line-height:1.6}

/* ===== Cooperation Section ===== */
.cooperation-section{
  padding:80px 24px;background:var(--bg-light);
}
.coop-inner{max-width:var(--max-width);margin:0 auto;text-align:center}
.coop-subtitle{font-size:14px;color:var(--text-secondary);margin-bottom:40px}
.coop-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:40px}
.coop-card{
  background:#fff;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid rgb(229,229,229);transition:all .3s;text-align:left;
}
.coop-card:hover{box-shadow:var(--shadow-card);transform:translateY(-2px)}
.coop-card.recommended{border-color:var(--brand-light);box-shadow:0 0 0 1px var(--brand-light)}
.coop-card-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 24px 0;
}
.coop-label{font-size:13px;font-weight:500;color:var(--text-secondary)}
.coop-badge{
  font-size:11px;font-weight:600;color:#fff;background:var(--brand);
  padding:2px 10px;border-radius:var(--radius-sm);
}
.coop-card-body{padding:16px 24px 24px}
.coop-desc{font-size:14px;font-weight:700;color:var(--text-tertiary);margin-bottom:16px}
.coop-features{display:flex;flex-direction:column;gap:10px}
.coop-features li{
  font-size:13px;color:var(--text-list);padding-left:18px;position:relative;
}
.coop-features li::before{
  content:"✓";position:absolute;left:0;color:var(--brand);font-weight:700;font-size:12px;
}
.security-badges{
  display:flex;gap:24px;justify-content:center;flex-wrap:wrap;
}
.security-item{
  display:flex;align-items:center;gap:8px;
  padding:10px 20px;background:#fff;border-radius:var(--radius-md);
  font-size:13px;font-weight:600;color:var(--text-primary);
  border:1px solid rgba(0,0,0,0.06);transition:all .2s;
}
.security-item:hover{border-color:var(--brand);color:var(--brand)}
.security-item svg{color:var(--brand);flex-shrink:0}

/* ===== CTA Section ===== */
.cta-section{
  background:var(--bg-cta);padding:60px 24px;text-align:center;
}
.cta-inner{max-width:560px;margin:0 auto}
.cta-title{font-size:22px;font-weight:700;color:#000;margin-bottom:12px}
.cta-desc{font-size:14px;color:var(--text-secondary);line-height:1.8;margin-bottom:32px}
.cta-btns{display:flex;gap:16px;justify-content:center;margin-bottom:32px;flex-wrap:wrap}
.cta-info{display:flex;flex-direction:column;gap:12px;align-items:center}
.cta-info-item{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--text-secondary);
}
.cta-info-item svg{color:var(--brand);flex-shrink:0}

/* ===== Footer ===== */
.footer{
  background:var(--bg-lighter);padding:0;
}
.footer-top{padding:48px 24px 32px}
.footer-cols{
  max-width:var(--max-width);margin:0 auto;
  display:grid;grid-template-columns:repeat(4,1fr);gap:32px;
}
.footer-col{display:flex;flex-direction:column;gap:10px}
.footer-col h3{font-size:15px;font-weight:700;color:#1A1A1A;margin-bottom:4px}
.footer-col a{font-size:13px;font-weight:480;color:#666;line-height:22px;transition:color .15s}
.footer-col a:hover{color:var(--brand)}
.footer-brand{
  text-align:center;padding:32px 24px;
  border-top:1px solid rgba(0,0,0,0.06);
  max-width:var(--max-width);margin:0 auto;
}
.footer-logo-img{
  height:64px;width:auto;margin:0 auto;display:block;
  mix-blend-mode:multiply;opacity:.9;
}
.footer-bottom{
  text-align:center;padding:24px;
  border-top:1px solid rgba(0,0,0,0.04);
}
.footer-bottom p{font-size:13px;color:#A0AEC0;line-height:1.6}
.footer-bottom a{color:#A0AEC0;text-decoration:none;transition:color .15s}
.footer-bottom a:hover{color:var(--brand);text-decoration:underline}

/* ===== Animations ===== */
@keyframes compact-rise-in{
  from{opacity:0;transform:translateY(24px)}
  to{opacity:1;transform:translateY(0)}
}
@keyframes ecosystem-orbit-spin{
  from{transform:rotate(0deg)}
  to{transform:rotate(360deg)}
}
@keyframes ecosystem-item-counter-spin{
  from{transform:rotate(0deg)}
  to{transform:rotate(-360deg)}
}
@keyframes marquee-scroll{
  from{transform:translateX(0)}
  to{transform:translateX(-50%)}
}
@keyframes spin{
  from{transform:rotate(0deg)}
  to{transform:rotate(360deg)}
}
@keyframes hero-text-in{
  from{opacity:0;transform:translateY(100%)}
  to{opacity:1;transform:translateY(0)}
}
@keyframes hero-text-out{
  from{opacity:1;transform:translateY(0)}
  to{opacity:0;transform:translateY(-100%)}
}
@keyframes fade-in-up{
  from{opacity:0;transform:translateY(30px)}
  to{opacity:1;transform:translateY(0)}
}

/* Scroll reveal */
.reveal{
  opacity:0;transform:translateY(30px);
  animation:fade-in-up .8s cubic-bezier(.16,1,.3,1) forwards;
  animation-delay:.15s;
}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .orbit-layers{grid-template-columns:repeat(2,1fr)}
  .coop-cards{grid-template-columns:1fr}
  .scene-panel.active{grid-template-columns:1fr}
}
@media(max-width:768px){
  .nav-desktop{display:none}
  .hamburger{display:flex}
  .header-actions{display:none}
  .hero-title{font-size:28px}
  .hero-rotate-wrapper{height:38px;min-width:100px}
  .demo-sidebar{display:none}
  .demo-body{padding:0}
  .footer-cols{grid-template-columns:repeat(2,1fr)}
  /* 轨道区移动端：缩小尺寸 + 胶囊紧凑样式，避免裁切 */
  .orbit-container{width:400px;height:400px;margin-bottom:32px}
  .orbit-card{padding:8px 16px 8px 8px;gap:8px;font-size:13px}
  .orbit-ico{width:32px;height:32px}
  .orbit-ico svg{width:16px;height:16px}
  .orbit-layers{grid-template-columns:1fr}
  .app-grid{grid-template-columns:1fr 1fr}
  .coop-cards{grid-template-columns:1fr}
  .scenes-tabs{flex-direction:column}
  .case-card{width:280px}
}
@media(max-width:480px){
  .hero-title{font-size:24px}
  .hero-btns{flex-direction:column;align-items:center}
  /* 超小屏进一步缩小轨道，保证左右胶囊不裁切 */
  .orbit-container{width:300px;height:300px}
  .orbit-card{padding:6px 12px 6px 6px;gap:6px;font-size:12px}
  .orbit-ico{width:26px;height:26px}
  .orbit-ico svg{width:13px;height:13px}
  .app-grid{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:1fr}
  .security-badges{flex-direction:column;align-items:center}
}