/* ===== KOS Design System ===== */
:root{
  --brand:#229AF4;--btn-start:#898EFF;--btn-end:#5E7DF9;--blue:#2563eb;--purple:#7c3aed;
  --dark:#0a0f1e;--dark2:#131b34;--dark3:#1a2240;--border:#e5e7eb;
  --title-color:#233863;--subtitle-color:#6D7B96;--body-color:#4A4A4A;
  --bg-white:#ffffff;--bg-alt:#F5F7FA;
  --gradient-btn:linear-gradient(135deg,#898EFF 0%,#5E7DF9 100%);
  --gradient-primary:linear-gradient(135deg,#898EFF 0%,#5E7DF9 50%,#229AF4 100%);
  --shadow-sm:0 1px 2px rgba(35,56,99,.04),0 1px 3px rgba(35,56,99,.06);
  --shadow-md:0 4px 8px rgba(35,56,99,.04),0 8px 24px rgba(35,56,99,.06);
  --shadow-lg:0 12px 24px rgba(35,56,99,.06),0 24px 48px rgba(35,56,99,.08);
  --shadow-xl:0 24px 48px rgba(35,56,99,.08),0 48px 96px rgba(35,56,99,.1);
  --shadow-glow:0 0 40px rgba(94,125,249,.25);
  --radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;--radius-2xl:32px;--radius-full:9999px;
  --font-sans:'PingFang SC','Microsoft YaHei',-apple-system,BlinkMacSystemFont,sans-serif;
  --blue:#2563eb;--purple:#7c3aed;--text:#1a1a2e;--text2:#4a5568;--muted:#9ca3af;--border:#e5e7eb;
  --success:#10b981;--warning:#f59e0b;--danger:#ef4444;
  --geo-primary:#6C5CE7;--geo-secondary:#A29BFE;--geo-accent:#00CEC9;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-sans);color:var(--body-color);background:var(--bg-white);overflow-x:hidden}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}

/* ===== NAV (from site) ===== */
.nav-wrap{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(0,0,0,.05);transition:box-shadow .3s}
.nav-wrap.scrolled{box-shadow:0 1px 16px rgba(0,0,0,.07)}
.nav{max-width:1280px;margin:0 auto;height:68px;display:flex;align-items:center;padding:0 40px}
.logo{display:flex;align-items:center;gap:10px;cursor:pointer;margin-right:48px;flex-shrink:0}
.logo-icon{width:40px;height:40px;border-radius:10px;object-fit:cover;flex-shrink:0;box-shadow:0 4px 12px rgba(37,99,235,.2)}
.logo-text{font-size:20px;font-weight:700;color:var(--text);letter-spacing:.5px}
.logo-text span{color:var(--blue)}
.nav-items{display:flex;align-items:center;gap:2px;flex:1}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:4px;padding:8px 16px;font-size:15px;color:var(--text2);border-radius:8px;cursor:pointer;transition:all .2s;font-weight:500;white-space:nowrap}
.nav-link:hover{color:var(--blue);background:rgba(37,99,235,.06)}
.nav-link.active{color:var(--blue);font-weight:600}
.nav-link.active::after{content:'';position:absolute;bottom:-22px;left:50%;transform:translateX(-50%);width:24px;height:3px;background:linear-gradient(90deg,var(--blue),var(--purple));border-radius:2px}
.nav-arrow{font-size:9px;transition:transform .25s;margin-top:1px;opacity:.6}
.nav-item:hover .nav-arrow{transform:rotate(180deg);opacity:1}
.dropdown{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(-12px);margin-top:10px;background:#fff;border-radius:16px;box-shadow:0 20px 50px rgba(0,0,0,.12),0 8px 20px rgba(0,0,0,.06);border:1px solid rgba(0,0,0,.04);width:620px;padding:0;opacity:0;visibility:hidden;transition:all .3s cubic-bezier(.4,0,.2,1);display:flex;overflow:hidden}
.dropdown::before{content:'';position:absolute;top:-12px;left:0;right:0;height:12px}
.nav-item:hover .dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dropdown-left{width:50%;padding:28px;border-right:1px solid #f0f2f5}
.dropdown-header{font-size:13px;color:var(--muted);margin-bottom:20px;font-weight:500;letter-spacing:.5px}
.product-list{display:flex;flex-direction:column;gap:18px}
.product-item{display:flex;align-items:flex-start;gap:14px;color:var(--text);padding:4px 0;border-radius:8px;transition:all .2s}
.product-item:hover .product-title{color:var(--blue)}
.product-item:hover .product-icon{background:#eff6ff}
.product-icon{width:40px;height:40px;border-radius:10px;background:#f8fafc;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:background .2s}
.product-icon svg{width:22px;height:22px;stroke:var(--blue);stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.product-title{font-size:15px;font-weight:600;color:var(--text);margin-bottom:4px;transition:color .2s}
.product-subtitle{font-size:13px;color:var(--muted);line-height:1.5}
.dropdown-right{width:50%;padding:28px;background:#f8fafc}
.video-section{margin-bottom:26px}
.video-title{font-size:15px;font-weight:600;color:var(--text);margin-bottom:14px}
.video-thumb{width:100%;aspect-ratio:16/9;background:linear-gradient(135deg,#3b82f6,#7c3aed);border-radius:12px;display:flex;align-items:center;justify-content:center;position:relative;cursor:pointer;overflow:hidden;transition:transform .25s,box-shadow .25s}
.video-thumb:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(59,130,246,.3)}
.video-thumb::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 30% 30%,rgba(255,255,255,.2),transparent 60%)}
.video-thumb::after{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);background-size:24px 24px}
.play-btn{width:48px;height:48px;background:rgba(255,255,255,.95);border-radius:50%;display:flex;align-items:center;justify-content:center;position:relative;z-index:2;box-shadow:0 4px 16px rgba(0,0,0,.15);transition:transform .2s}
.video-thumb:hover .play-btn{transform:scale(1.08)}
.play-btn svg{width:16px;height:16px;fill:#3b82f6;margin-left:2px}
.video-badge{position:absolute;top:10px;right:12px;background:rgba(0,0,0,.35);color:#fff;font-size:11px;padding:3px 8px;border-radius:4px;z-index:2}
.video-label{position:absolute;bottom:10px;left:12px;color:#fff;font-size:12px;z-index:2;text-shadow:0 1px 2px rgba(0,0,0,.2)}
.article-link{display:flex;align-items:center;gap:12px;padding:10px;border-radius:10px;transition:background .2s}
.article-link:hover{background:#fff}
.article-icon{width:40px;height:40px;background:#eff6ff;border-radius:8px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.article-icon svg{width:20px;height:20px;stroke:var(--blue);stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.article-content{flex:1;min-width:0}
.article-title{font-size:14px;color:var(--text);font-weight:500;line-height:1.4;margin-bottom:3px}
.article-meta{font-size:12px;color:var(--muted)}
.nav-right{display:flex;align-items:center;flex-shrink:0}
.nav-cta{padding:10px 26px;background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;border:none;border-radius:9px;font-size:14px;font-weight:600;cursor:pointer;transition:all .25s;box-shadow:0 4px 14px rgba(37,99,235,0.28);display:inline-block}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(37,99,235,0.38)}
.nav-phone{display:flex;align-items:center;gap:6px;margin-right:16px;font-size:15px;font-weight:700;color:var(--text);transition:color .2s;white-space:nowrap;cursor:pointer}
.nav-phone svg{width:18px;height:18px;stroke:var(--blue);stroke-width:2;fill:none}
.nav-phone:hover{color:var(--blue)}
.mobile-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:6px}
.mobile-toggle span{width:22px;height:2px;background:#333;border-radius:2px;transition:all .3s}

/* ===== KOS Section Styles ===== */
.kos-page{font-family:var(--font-sans);color:var(--body-color);background:var(--bg-white);overflow-x:hidden}
.section .container{max-width:1260px;margin:0 auto;padding:0 24px}
.section{padding:88px 0;position:relative}
.section-header{text-align:center;max-width:850px;margin:0 auto 64px}
.section-tag{display:inline-block;font-size:14px;color:var(--geo-primary);font-weight:600;margin-bottom:12px;letter-spacing:1px}
.section-title{font-size:40px;font-weight:600;line-height:1.3;color:var(--title-color);margin-bottom:20px}
.section-desc{font-size:20px;font-weight:400;color:var(--subtitle-color);line-height:1.6}
.gradient-text{background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.geo-gradient{background:linear-gradient(135deg,var(--geo-primary) 0%,var(--geo-secondary) 50%,var(--geo-accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:600;border-radius:var(--radius-md);cursor:pointer;transition:all .25s;white-space:nowrap;position:relative;overflow:hidden;padding:12px 24px;border:none;font-family:var(--font-sans)}
.btn-lg{height:52px;padding:0 32px;font-size:16px;border-radius:var(--radius-lg)}
.btn-primary{background:var(--gradient-btn);color:#fff;box-shadow:0 4px 12px rgba(94,125,249,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(94,125,249,.4)}
.btn-outline{background:#fff;color:var(--title-color);border:1.5px solid #E0E4ED}
.btn-outline:hover{border-color:var(--btn-end);color:var(--btn-end);transform:translateY(-2px);box-shadow:var(--shadow-md)}

/* Hero */
/* Hero - geo.html 风格：AI机器人+虚线连接+浮动AI logo */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes floatLogo{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes dashFlow{to{stroke-dashoffset:-20}}
@keyframes pulseGlow{0%,100%{opacity:.5}50%{opacity:.8}}
@keyframes robotBlink{0%,92%,100%{transform:scaleY(1)}96%{transform:scaleY(0.1)}}
@keyframes scanLine{0%,100%{opacity:.2;transform:translateY(0)}50%{opacity:.8;transform:translateY(40px)}}
.hero{position:relative;padding:100px 0 80px;overflow:hidden;min-height:600px;background:linear-gradient(180deg,#f5f3ff 0%,#eef8ff 50%,#f0f3ff 100%)}
.hero::before{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:900px;height:240px;background:radial-gradient(ellipse at center bottom,rgba(167,146,255,.18),transparent 70%);pointer-events:none}
.hero::after{content:'';position:absolute;top:15%;right:8%;width:140px;height:140px;border-radius:50%;background:radial-gradient(circle,rgba(108,92,231,.1),transparent 70%);pointer-events:none}
.hero-content{position:relative;z-index:1;display:flex;align-items:center;gap:40px;max-width:1260px;margin:0 auto;padding:0 24px}
.hero-text{flex:0 0 42%;text-align:left}
.hero-title{font-size:42px;font-weight:700;line-height:1.3;color:#233863;margin-bottom:20px;animation:fadeInUp .8s ease .1s both}
.hero-subtitle{font-size:17px;font-weight:400;color:#233863;line-height:1.7;margin-bottom:32px;animation:fadeInUp .8s ease .2s both;opacity:.8}
.hero-cta{animation:fadeInUp .8s ease .3s both}
.hero-cta .btn-geo{display:inline-block;padding:14px 36px;background:linear-gradient(270deg,#A792FF 0%,#8296FF 100%);color:#fff;font-size:16px;font-weight:600;border-radius:45px;border:1px solid #F4F1F1;box-shadow:0 8px 24px rgba(130,150,255,.3);transition:all .25s}
.hero-cta .btn-geo:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(130,150,255,.4);color:#fff}
.hero-cta .btn-geo-outline{background:#fff;color:#6C5CE7;border:1.5px solid rgba(108,92,231,.25);box-shadow:0 4px 16px rgba(108,92,231,.08);margin-left:12px}
.hero-cta .btn-geo-outline:hover{border-color:#8296FF;color:#8296FF;box-shadow:0 8px 24px rgba(130,150,255,.15)}
/* Hero Visual - AI Robot + dashed connections + floating AI logos */
.hero-visual{flex:1;position:relative;min-height:500px;animation:fadeInUp 1s ease .4s both}
.hero-robot-svg{width:100%;max-width:560px;height:auto;display:block;margin:0 auto}
.hero-ai-logo{position:absolute;display:flex;align-items:center;gap:8px;padding:5px 16px 5px 5px;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-radius:30px;box-shadow:0 6px 20px rgba(6,182,212,.18);border:1px solid rgba(6,182,212,.15);font-size:13px;font-weight:600;color:#4a5568;white-space:nowrap;animation:floatLogo 4s ease-in-out infinite;z-index:3;transition:transform .25s,box-shadow .25s}
.hero-ai-logo:hover{transform:translateY(-3px) scale(1.05);box-shadow:0 10px 28px rgba(6,182,212,.28)}
.hero-ai-logo img{width:32px;height:32px;border-radius:50%;object-fit:cover;flex-shrink:0;box-shadow:0 2px 8px rgba(0,0,0,.1)}
.hero-ai-logo .logo-name{font-size:13px;font-weight:600;color:#3d4250}
.hero-ai-logo.logo-doubao{top:2%;left:0;animation-delay:0s}
.hero-ai-logo.logo-ernie{top:10%;right:-2%;animation-delay:.8s}
.hero-ai-logo.logo-deepseek{bottom:12%;left:-2%;animation-delay:1.6s}
.hero-ai-logo.logo-kimi{bottom:3%;right:2%;animation-delay:2.4s}
.hero-ai-logo.logo-yuanbao{top:46%;right:-4%;animation-delay:3.2s}

/* Pain Points */
.section-pain{background:linear-gradient(180deg,var(--bg-alt) 0%,var(--bg-white) 100%);position:relative;overflow:hidden}
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.pain-card{background:#fff;border:1px solid #EEF0F6;border-radius:var(--radius-xl);padding:36px 28px;text-align:center;transition:all .25s;position:relative;overflow:hidden}
.pain-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(135deg,var(--danger),#f97316);transform:scaleX(0);transform-origin:left;transition:transform .25s}
.pain-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-xl);border-color:transparent}
.pain-card:hover::before{transform:scaleX(1)}
.pain-card-icon{width:72px;height:72px;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;margin:0 auto 20px;font-size:32px;transition:transform .25s}
.pain-card:hover .pain-card-icon{transform:scale(1.1) rotate(-5deg)}
.pain-icon-1{background:linear-gradient(135deg,#ff6b6b,#ee5a24);box-shadow:0 8px 24px rgba(255,107,107,.3)}
.pain-icon-2{background:linear-gradient(135deg,#a855f7,#c084fc);box-shadow:0 8px 24px rgba(168,85,247,.3)}
.pain-icon-3{background:linear-gradient(135deg,#f59e0b,#fbbf24);box-shadow:0 8px 24px rgba(245,158,11,.3)}
.pain-icon-4{background:linear-gradient(135deg,#6b7280,#9ca3af);box-shadow:0 8px 24px rgba(107,114,128,.3)}
.pain-card h3{font-size:18px;font-weight:600;color:var(--title-color);margin-bottom:10px}
.pain-card p{font-size:14px;color:var(--subtitle-color);line-height:1.6}
.pain-connector{display:block;width:959px;max-width:100%;height:auto;margin:24px auto 0}
.pain-warning{display:block;width:828px;max-width:calc(100% - 48px);margin:0 auto;padding:0;height:80px;line-height:80px;background:linear-gradient(270deg,#A792FF 0%,#8296FF 100%);border-radius:16px;border:1px solid #F4F1F1;text-align:center;font-size:22px;font-weight:600;color:#fff;box-shadow:0 8px 24px rgba(130,150,255,.25)}

/* Core Value (3 pillars) */
.section-core{background:var(--bg-white);position:relative;overflow:hidden}
.section-core::before{content:'';position:absolute;top:0;left:0;width:500px;height:500px;background:radial-gradient(circle,rgba(108,92,231,.06) 0%,transparent 70%);pointer-events:none}
.core-pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.pillar-card{background:#fff;border-radius:var(--radius-2xl);padding:48px 36px;text-align:center;border:1px solid #EEF0F6;transition:all .25s;position:relative;overflow:hidden}
.pillar-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-xl);border-color:transparent}
.pillar-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;border-radius:4px 4px 0 0}
.pillar-card:nth-child(1)::before{background:linear-gradient(90deg,#6C5CE7,#A29BFE)}
.pillar-card:nth-child(2)::before{background:linear-gradient(90deg,#00CEC9,#55efc4)}
.pillar-card:nth-child(3)::before{background:linear-gradient(90deg,#fdcb6e,#ffeaa7)}
.pillar-icon-wrap{width:80px;height:80px;border-radius:var(--radius-xl);display:flex;align-items:center;justify-content:center;margin:0 auto 24px;position:relative}
.pillar-card:nth-child(1) .pillar-icon-wrap{background:linear-gradient(135deg,#6C5CE7,#A29BFE);box-shadow:0 12px 32px rgba(108,92,231,.35)}
.pillar-card:nth-child(2) .pillar-icon-wrap{background:linear-gradient(135deg,#00CEC9,#55efc4);box-shadow:0 12px 32px rgba(0,206,201,.35)}
.pillar-card:nth-child(3) .pillar-icon-wrap{background:linear-gradient(135deg,#fdcb6e,#ffeaa7);box-shadow:0 12px 32px rgba(253,203,110,.35)}
.pillar-icon-wrap svg{width:36px;height:36px;stroke:#fff;stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.pillar-card h3{font-size:24px;font-weight:600;color:var(--title-color);margin-bottom:16px}
.pillar-card p{font-size:15px;color:var(--subtitle-color);line-height:1.7;margin-bottom:24px}
.pillar-tag{display:inline-block;padding:6px 16px;border-radius:var(--radius-full);font-size:13px;font-weight:600}
.pillar-card:nth-child(1) .pillar-tag{background:rgba(108,92,231,.08);color:#6C5CE7}
.pillar-card:nth-child(2) .pillar-tag{background:rgba(0,206,201,.08);color:#00CEC9}
.pillar-card:nth-child(3) .pillar-tag{background:rgba(253,203,110,.08);color:#e17055}

/* Product Features */
.section-features{background:var(--bg-alt)}
.feature-rows{display:flex;flex-direction:column;gap:40px}
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;background:#fff;border-radius:var(--radius-2xl);padding:40px;border:1px solid #EEF0F6;transition:all .25s}
.feature-row:hover{box-shadow:var(--shadow-lg);border-color:rgba(108,92,231,.15)}
.feature-row:nth-child(even) .feature-info{order:2}
.feature-row:nth-child(even) .feature-visual{order:1}
.feature-info{padding:8px}
.feature-num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:8px;background:linear-gradient(135deg,var(--geo-primary),var(--geo-secondary));color:#fff;font-size:14px;font-weight:700;margin-bottom:16px}
.feature-info h3{font-size:24px;font-weight:600;color:var(--title-color);margin-bottom:12px}
.feature-info .feature-desc{font-size:15px;color:var(--subtitle-color);line-height:1.7;margin-bottom:20px}
.feature-highlight{display:flex;align-items:center;gap:8px;padding:12px 16px;background:rgba(108,92,231,.06);border-radius:var(--radius-md);border:1px solid rgba(108,92,231,.12)}
.feature-highlight-icon{width:28px;height:28px;border-radius:7px;background:linear-gradient(135deg,var(--geo-primary),var(--geo-secondary));display:flex;align-items:center;justify-content:center;flex-shrink:0}
.feature-highlight-icon svg{width:14px;height:14px;stroke:#fff;stroke-width:2;fill:none;stroke-linecap:round;stroke-linejoin:round}
.feature-highlight span{font-size:14px;font-weight:600;color:var(--geo-primary)}
.feature-highlight p{font-size:13px;color:var(--subtitle-color);margin-top:2px}
.feature-visual{display:flex;align-items:center;justify-content:center;min-height:280px;border-radius:var(--radius-xl);position:relative;overflow:hidden}
.feature-visual-inner{width:100%;height:260px;background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow-md);display:flex;flex-direction:column;overflow:hidden;border:1px solid #E0E4ED}
.feature-visual-header{padding:10px 16px;background:var(--bg-alt);display:flex;align-items:center;gap:10px;border-bottom:1px solid #E0E4ED}
.feature-visual-header .mock-dots{display:flex;gap:6px}
.feature-visual-header .mock-dots span{width:10px;height:10px;border-radius:50%;padding:0}
.feature-visual-header .mock-dots span:nth-child(1){background:#ff5f57}
.feature-visual-header .mock-dots span:nth-child(2){background:#ffbd2e}
.feature-visual-header .mock-dots span:nth-child(3){background:#28c940}
.feature-visual-header .fv-label{font-size:12px;color:var(--subtitle-color);font-weight:500}
.feature-visual-body{flex:1;padding:20px;display:flex;flex-direction:column;gap:12px;overflow:hidden}
.fv-row{display:flex;align-items:center;gap:10px}
.fv-block{padding:12px;background:var(--bg-alt);border-radius:10px;border:1px solid #E0E4ED;display:flex;flex-direction:column;gap:6px}
.fv-block-title{font-size:12px;font-weight:600;color:var(--title-color)}
.fv-block-sub{font-size:10px;color:var(--muted)}
.fv-badge{display:inline-block;padding:3px 8px;border-radius:4px;font-size:10px;font-weight:600}
.fv-badge.geo{background:rgba(108,92,231,.08);color:#6C5CE7}
.fv-badge.ai{background:rgba(0,206,201,.08);color:#00CEC9}
.fv-badge.success{background:rgba(16,185,129,.08);color:#10b981}
.fv-stats{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.fv-stat{padding:10px;background:#fff;border-radius:8px;border:1px solid #E0E4ED;text-align:center}
.fv-stat-value{font-size:18px;font-weight:700;color:var(--title-color)}
.fv-stat-label{font-size:10px;color:var(--muted)}
.fv-chat{display:flex;flex-direction:column;gap:8px;padding:12px;background:#fff;border-radius:10px;border:1px solid #E0E4ED}
.fv-chat-q{padding:10px 14px;background:linear-gradient(135deg,#f0f3ff,#f5f3ff);border-radius:10px;font-size:12px;color:var(--title-color);border-left:3px solid var(--geo-primary)}
.fv-chat-a{padding:10px 14px;background:linear-gradient(135deg,#eefff5,#e8fff0);border-radius:10px;font-size:12px;color:var(--body-color);border-left:3px solid #00CEC9}
.fv-chat-a b{color:#00CEC9;font-weight:600}

/* Use Cases */
.section-usecases{background:linear-gradient(180deg,var(--bg-white) 0%,var(--bg-alt) 100%);position:relative;overflow:hidden}
.usecases-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.usecase-card{background:#fff;border-radius:var(--radius-2xl);overflow:hidden;border:1px solid #EEF0F6;transition:all .25s}
.usecase-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-xl);border-color:transparent}
.usecase-header{padding:24px 28px;display:flex;align-items:center;gap:12px}
.usecase-tag{display:inline-block;padding:5px 14px;border-radius:4px;font-size:12px;font-weight:600}
.usecase-card:nth-child(1) .usecase-tag{background:rgba(108,92,231,.08);color:#6C5CE7}
.usecase-card:nth-child(2) .usecase-tag{background:rgba(0,206,201,.08);color:#00CEC9}
.usecase-card:nth-child(3) .usecase-tag{background:rgba(245,158,11,.08);color:#d97706}
.usecase-card:nth-child(4) .usecase-tag{background:rgba(16,185,129,.08);color:#059669}
.usecase-body{padding:20px 28px 28px}
.usecase-pain{font-size:14px;color:var(--body-color);line-height:1.7;margin-bottom:14px;padding:10px 0;border-bottom:1px dashed #E0E4ED}
.usecase-solution{display:flex;gap:8px;margin-bottom:14px;padding:10px 0;border-bottom:1px dashed #E0E4ED}
.solution-label{flex-shrink:0;width:48px;height:24px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;border-radius:4px;background:rgba(108,92,231,.08);color:var(--geo-primary)}
.usecase-result{display:flex;align-items:center;gap:10px;padding:10px 0}
.result-icon{width:32px;height:32px;border-radius:8px;background:linear-gradient(135deg,#10b981,#34d399);display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 4px 12px rgba(16,185,129,.3)}
.result-icon svg{width:16px;height:16px;stroke:#fff;stroke-width:2;fill:none;stroke-linecap:round;stroke-linejoin:round}
.result-text{font-size:15px;font-weight:600;color:#10b981}

/* CTA */
.cta-section{padding:0;position:relative;overflow:hidden}
.cta-inner{max-width:none;margin:0;background:linear-gradient(90deg,#6C5CE7 0%,#00CEC9 100%);padding:90px 40px;text-align:center;position:relative;overflow:hidden}
.cta-inner::before{content:'';position:absolute;top:-30%;right:-5%;width:600px;height:600px;background:radial-gradient(circle,rgba(255,255,255,0.12),transparent 70%);border-radius:50%;pointer-events:none}
.cta-inner::after{content:'';position:absolute;bottom:-40%;left:-10%;width:500px;height:500px;background:radial-gradient(circle,rgba(255,255,255,0.08),transparent 70%);border-radius:50%;pointer-events:none}
.cta-title{font-size:36px;font-weight:800;color:#fff;margin-bottom:12px;position:relative;z-index:1}
.cta-desc{font-size:17px;color:rgba(255,255,255,0.9);line-height:1.6;margin-bottom:36px;position:relative;z-index:1}
.cta-button{display:inline-flex;align-items:center;gap:8px;padding:16px 48px;background:#fff;color:#6C5CE7;font-size:16px;font-weight:700;border-radius:10px;transition:all .25s;position:relative;z-index:1;box-shadow:0 8px 24px rgba(0,0,0,0.15)}
.cta-button:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(0,0,0,0.2);background:#f8f9ff}

/* ===== FLOAT WIDGET ===== */
.float-widget{position:fixed;right:20px;top:50%;transform:translateY(-50%);z-index:9999;display:flex;flex-direction:column;gap:10px;align-items:flex-end}
.float-btn{position:relative;display:flex;align-items:center;justify-content:center;width:52px;height:52px;border-radius:12px;background:#fff;border:1px solid var(--border);box-shadow:0 4px 16px rgba(0,0,0,.08);cursor:pointer;transition:all .25s;color:var(--blue)}
.float-btn svg{width:22px;height:22px;stroke:currentColor;stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.float-btn:hover{background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;border-color:transparent;transform:translateY(-2px);box-shadow:0 8px 24px rgba(37,99,235,.25)}
.float-btn .float-tip{position:absolute;right:60px;top:50%;transform:translateY(-50%) translateX(-8px);white-space:nowrap;background:#1a1a2e;color:#fff;font-size:13px;padding:8px 14px;border-radius:8px;opacity:0;visibility:hidden;transition:all .25s;pointer-events:none;font-weight:500}
.float-btn:hover .float-tip{opacity:1;visibility:visible;transform:translateY(-50%) translateX(0)}
.float-btn .float-tip::after{content:'';position:absolute;right:-5px;top:50%;transform:translateY(-50%);border-width:5px 0 5px 6px;border-style:solid;border-color:transparent transparent transparent #1a1a2e}
.float-btn.wechat-btn:hover .wechat-pop{opacity:1;visibility:visible;transform:translateY(-50%) translateX(0)}
.wechat-pop{position:absolute;right:60px;top:50%;transform:translateY(-50%) translateX(-8px);opacity:0;visibility:hidden;transition:all .25s;background:#fff;border-radius:14px;padding:16px;box-shadow:0 8px 32px rgba(0,0,0,.12);text-align:center;width:160px}
.wechat-pop img{width:120px;height:120px;border-radius:8px;margin:0 auto 8px}
.wechat-pop .wp-title{font-size:14px;font-weight:600;color:var(--text)}
.wechat-pop .wp-sub{font-size:12px;color:var(--muted);margin-top:4px}
.float-btn.phone-btn:hover .phone-pop,.float-btn.phone-btn.active .phone-pop{opacity:1;visibility:visible;transform:translateY(-50%) translateX(0)}
.phone-pop{position:absolute;right:60px;top:50%;transform:translateY(-50%) translateX(-8px);opacity:0;visibility:hidden;transition:all .25s;background:#fff;border-radius:14px;padding:16px 20px;box-shadow:0 8px 32px rgba(0,0,0,.12);display:flex;align-items:center;gap:12px}
.phone-pop-icon{width:40px;height:40px;border-radius:10px;background:#fef2f2;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.phone-pop-icon svg{width:20px;height:20px;stroke:#ef4444;stroke-width:2;fill:none}
.phone-pop-num{font-size:20px;font-weight:800;color:var(--text)}
.float-btn.top-btn{opacity:0;visibility:hidden;transform:translateY(20px)}
.float-btn.top-btn.show{opacity:1;visibility:visible;transform:translateY(0)}

/* ===== FOOTER ===== */
.footer{background:#0a0f1e;padding:64px 40px 32px}
.footer-inner{max-width:1280px;margin:0 auto}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:36px;margin-bottom:48px}
.footer-brand .f-logo{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .f-logo img{width:40px;height:40px;border-radius:10px}
.footer-brand .f-logo span{font-size:20px;font-weight:700;color:#fff}
.footer-brand .f-logo span em{color:#60a5fa;font-style:normal}
.footer-brand p{font-size:14px;color:rgba(255,255,255,.4);line-height:1.8;margin-bottom:20px;max-width:320px}
.footer-contact{display:flex;flex-direction:column;gap:10px}
.footer-contact-item{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.5)}
.footer-contact-item svg{width:16px;height:16px;stroke:rgba(255,255,255,.4);stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:20px}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:12px}
.footer-col ul li a{font-size:14px;color:rgba(255,255,255,.4);transition:color .2s}
.footer-col ul li a:hover{color:#60a5fa}
.footer-bottom{padding-top:24px;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.3)}
.footer-bottom a{font-size:13px;color:rgba(255,255,255,.3);transition:color .2s}
.footer-bottom a:hover{color:#60a5fa}

/* Scroll Animations */
[data-aos]{opacity:0;transform:translateY(30px);transition:all .8s cubic-bezier(.4,0,.2,1)}
[data-aos].aos-animate{opacity:1;transform:translateY(0)}

/* Responsive */
@media(max-width:1024px){
  .section{padding:80px 0}
  .hero-content{flex-direction:column;text-align:center;gap:30px}
  .hero-text{flex:none;text-align:center;width:100%}
  .hero-visual{flex:none;width:100%;min-height:400px;margin-top:10px}
  .hero-title{font-size:36px}
  .pain-grid{grid-template-columns:repeat(2,1fr)}
  .core-pillars{grid-template-columns:1fr}
  .feature-row{grid-template-columns:1fr}
  .feature-row:nth-child(even) .feature-info{order:1}
  .feature-row:nth-child(even) .feature-visual{order:2}
  .usecases-grid{grid-template-columns:1fr}
  .section-title{font-size:32px}
  .section-desc{font-size:18px}
  .arch-body{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .section{padding:60px 0}
  .hero{padding:60px 0 40px;min-height:auto}
  .hero-title{font-size:30px}
  .hero-subtitle{font-size:15px}
  .hero-visual{min-height:300px}
  .hero-ai-logo{font-size:11px;padding:3px 12px 3px 3px}
  .hero-ai-logo img{width:26px;height:26px}
  .hero-ai-logo .logo-name{font-size:11px}
  .pain-grid{grid-template-columns:1fr}
  .pain-connector{width:100%}
  .pain-warning{font-size:16px;height:auto;line-height:1.8;padding:16px 20px}
  .hero-cta .btn-geo{padding:12px 28px;font-size:14px}
  .hero-cta .btn-geo-outline{margin-left:0;margin-top:12px;display:block;width:fit-content;margin-left:auto;margin-right:auto}
  .btn-lg{height:44px;padding:0 24px;font-size:15px}
  .section-title{font-size:28px}
  .section-desc{font-size:16px}
  .nav-items,.nav-phone{display:none}
  .float-widget{right:12px;top:50%;transform:translateY(-50%)}
  .float-btn{width:46px;height:46px}
  .float-btn .float-tip,.float-btn .wechat-pop{display:none}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .pillar-card{padding:32px 24px}
  .feature-row{padding:24px}
  .feature-visual-inner{height:220px}
}