:root{
  --vi:#277FFF;
  --vi-dark:#1B5FD0;
  --ink:#0B1729;
  --ink-2:#47536B;
  --ink-3:#5C6A80;
  --muted:#8A96AA;
  --soft:#F6F9FF;
  --chip:#EBF2FF;
  --line:#E4EBF5;
  --card-line:#DBE7F7;
  --panel-grad-a:#F7FAFF;
  --panel-grad-b:#E8F2FF;
  --ai-a:#4A94FF;
  --ai-b:#1450CC;
  --font:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --wrap:1440px;
  --pad:120px;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font);
  color:var(--ink);
  background:#fff;
  -webkit-font-smoothing:antialiased;
  line-height:1.5;
}
.wrap{max-width:var(--wrap);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad);}
a{text-decoration:none;color:inherit;}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:600;color:var(--vi);letter-spacing:.12em;}
.eyebrow::before{content:"";width:22px;height:3px;border-radius:2px;background:var(--vi);}
.sec-title{font-size:40px;font-weight:700;color:var(--ink);line-height:54px;margin-top:18px;}
.sec-desc{font-size:17px;color:var(--ink-3);line-height:30px;max-width:820px;margin-top:18px;}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:76px;}
.brand{display:flex;align-items:center;gap:12px;}
.logo-mark{width:36px;height:36px;border-radius:10px;background:var(--vi);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.logo-mark svg{display:block;}
.brand-name{font-size:19px;font-weight:700;color:var(--ink);}
.brand-div{width:1px;height:20px;background:var(--line);}
.brand-sub{font-size:15px;font-weight:500;color:var(--ink-2);}
.nav{display:flex;align-items:center;gap:36px;}
.nav a{font-size:15px;color:var(--ink-2);transition:color .2s;}
.nav a:hover{color:var(--vi);}
.header-actions{display:flex;align-items:center;gap:20px;}
.login{font-size:15px;color:var(--ink-2);cursor:pointer;}
.btn-cta{background:var(--vi);color:#fff;font-size:15px;font-weight:600;padding:10px 22px;border-radius:8px;border:none;cursor:pointer;transition:background .2s;}
.btn-cta:hover{background:var(--vi-dark);}

/* ===== Hero ===== */
.hero{
  position:relative;overflow:hidden;
  background-color:var(--ink);
  background-image:
    radial-gradient(circle at 78% -8%, rgba(39,127,255,.18), transparent 46%),
    radial-gradient(circle at 0% 85%, rgba(39,127,255,.09), transparent 42%),
    linear-gradient(rgba(39,127,255,.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(39,127,255,.12) 1px, transparent 1px);
  background-size:100% 100%,100% 100%,46px 46px,46px 46px;
  color:#fff;
}
.hero-inner{padding-top:88px;padding-bottom:88px;position:relative;z-index:2;}
.hero-content{display:grid;grid-template-columns:1fr 540px;gap:72px;align-items:center;}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:100px;background:rgba(255,255,255,.10);font-size:13px;font-weight:500;color:#D6E4FF;width:fit-content;}
.badge-dot{width:7px;height:7px;border-radius:50%;background:var(--vi);}
.hero-headline{font-size:54px;font-weight:700;line-height:74px;color:#fff;margin-top:24px;}
.hero-sub{font-size:17px;line-height:30px;color:#C7D9ED;margin-top:24px;white-space:pre-line;}
.hero-trust{display:flex;gap:26px;margin-top:24px;flex-wrap:wrap;}
.trust{display:flex;align-items:center;gap:8px;font-size:14px;color:#B4C1D6;}
.trust svg{flex-shrink:0;}

/* Hero visual panel */
.panel{
  background:linear-gradient(160deg,var(--panel-grad-a),var(--panel-grad-b));
  border:1px solid var(--card-line);
  border-radius:24px;padding:26px;
  box-shadow:0 24px 48px rgba(0,0,0,.40);
}
.panel-head{display:flex;align-items:center;justify-content:space-between;}
.panel-title{font-size:15px;font-weight:600;color:var(--ink);}
.live-badge{display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border-radius:100px;background:var(--chip);}
.live-dot{width:6px;height:6px;border-radius:50%;background:var(--vi);}
.live-text{font-size:12px;font-weight:500;color:var(--vi-dark);}
.panel-graph{margin:14px 0;}
.panel-graph svg{display:block;width:100%;height:auto;}
.panel-divider{height:1px;background:#E1EAF6;margin:4px 0;}
.panel-strip{display:flex;align-items:center;justify-content:space-between;}
.strip-lead{font-size:13px;font-weight:500;color:var(--vi-dark);}
.strip-items{display:flex;gap:18px;font-size:13px;color:#66738A;}

/* ===== Section base ===== */
.section{padding-top:110px;padding-bottom:110px;}
.section-soft{background:var(--soft);}

/* ===== 三大困境 ===== */
.pain-list{margin-top:44px;}
.pain-row{display:flex;align-items:flex-start;gap:40px;padding:30px 0;}
.pain-row + .pain-row{border-top:1px solid var(--line);}
.pain-index{font-size:40px;font-weight:700;color:var(--vi);width:88px;flex-shrink:0;}
.pain-title{font-size:26px;font-weight:700;color:var(--ink);width:200px;flex-shrink:0;}
.pain-desc{font-size:16px;line-height:28px;color:var(--ink-2);flex:1;}

/* ===== 四大核心模块 Bento ===== */
.bento{margin-top:44px;display:flex;flex-direction:column;gap:24px;}
.module{
  border-radius:20px;padding:36px 40px;
  border:1px solid var(--card-line);
  background:linear-gradient(160deg,var(--panel-grad-a),var(--panel-grad-b));
}
.module-row{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.card-white{
  background:#fff;border:1px solid var(--line);border-radius:20px;padding:32px;
  box-shadow:0 12px 32px rgba(11,33,89,.07);
}
.module-ai{
  background:linear-gradient(135deg,var(--ai-a),var(--ai-b));
  border:none;color:#fff;position:relative;overflow:hidden;
}
.module-ai::after{
  content:"";position:absolute;top:-240px;right:-80px;width:640px;height:640px;
  background:radial-gradient(circle, rgba(255,255,255,.22), transparent 60%);
  pointer-events:none;
}
.mod-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;}
.mod-left{display:flex;flex-direction:column;gap:12px;}
.mod-chip{padding:4px 10px;border-radius:6px;background:var(--vi);color:#fff;font-size:13px;font-weight:600;width:fit-content;}
.module-ai .mod-chip{background:rgba(255,255,255,.20);}
.mod-title{font-size:28px;font-weight:700;color:var(--ink);}
.module-ai .mod-title{color:#fff;}
.mod-sub{font-size:16px;font-weight:500;color:var(--vi-dark);}
.module-ai .mod-sub{color:#D6E4FF;}
.mod-icon{width:44px;height:44px;border-radius:12px;background:var(--vi);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.module-ai .mod-icon{background:rgba(255,255,255,.18);}

.feat-row{display:grid;grid-template-columns:1fr 1px 1fr 1px 1fr;gap:0;margin-top:26px;align-items:stretch;}
.ai-feat-row{display:grid;grid-template-columns:1fr 1px 1fr 1px 1fr;gap:0;margin-top:26px;align-items:stretch;position:relative;z-index:2;}
.feat{padding:0 30px;}
.feat:first-child{padding-left:0;}
.feat:last-child{padding-right:0;}
.feat-bar{width:20px;height:3px;border-radius:2px;background:var(--vi);margin-bottom:9px;}
.ai-feat-row .feat-bar{background:rgba(255,255,255,.65);}
.feat-title{font-size:16px;font-weight:600;color:var(--ink);margin-bottom:9px;}
.module-ai .feat-title{color:#fff;}
.feat-desc{font-size:14px;line-height:24px;color:var(--ink-3);}
.module-ai .feat-desc{color:#D6E4FF;}
.feat-div{background:#DBE2F0;}
.ai-feat-div{background:rgba(255,255,255,.22);}

.mod-list{display:flex;flex-direction:column;gap:16px;margin-top:22px;}
.list-item{display:flex;flex-direction:column;gap:5px;}
.list-title{font-size:15px;font-weight:600;color:var(--ink);}
.list-desc{font-size:14px;line-height:23px;color:var(--ink-3);}

/* ===== 适用形态 2x2 ===== */
.forms-matrix{
  margin-top:44px;background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;
}
.form-grid{display:grid;grid-template-columns:1fr 1fr;}
.form-cell{padding:34px 40px;min-height:220px;display:flex;flex-direction:column;gap:16px;}
.form-cell + .form-cell{border-left:1px solid var(--line);}
.form-grid + .form-grid .form-cell{border-top:1px solid var(--line);}
.form-head{display:flex;align-items:center;gap:14px;}
.form-icon{width:44px;height:44px;border-radius:12px;background:var(--chip);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.form-title{font-size:21px;font-weight:700;color:var(--ink);}
.form-desc{font-size:15px;line-height:26px;color:var(--ink-3);}

/* ===== Footer CTA ===== */
.cta-band{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,var(--vi),var(--vi-dark));
  padding:64px var(--pad);
}
.cta-band::after{
  content:"";position:absolute;top:-40px;right:160px;width:520px;height:240px;
  background:radial-gradient(circle, rgba(140,180,255,.35), transparent 60%);
  pointer-events:none;
}
.cta-inner{position:relative;z-index:2;max-width:var(--wrap);margin:0 auto;}
.cta-title{font-size:30px;font-weight:700;color:#fff;line-height:42px;}
.cta-sub{font-size:16px;line-height:26px;color:#D6E4FF;margin-top:12px;}

/* ===== responsive ===== */
@media (max-width:1080px){
  :root{--pad:48px;}
  .hero-content{grid-template-columns:1fr;}
  .module-row{grid-template-columns:1fr;}
  .feat-row,.ai-feat-row{grid-template-columns:1fr;}
  .feat{grid-column:auto;padding:0;}
  .feat-div,.ai-feat-div{display:none;}
  .form-grid{grid-template-columns:1fr;}
  .form-cell + .form-cell{border-left:none;}
  .nav{display:none;}
}
@media (max-width:640px){
  :root{--pad:20px;}
  .sec-title,.hero-headline{font-size:34px;line-height:46px;}
  .pain-row{flex-direction:column;gap:10px;}
  .pain-index,.pain-title{width:auto;}
}