:root{--primary:#2563eb;--accent:#6366f1;--text:#111827;--text-s:#374151;--text-m:#6b7280;--text-main:#111827;--text-muted:#6b7280;--bg:#f9fafb;--bg-w:#fff;--bg-card:#fff;--bg-alt:#f3f4f6;--border:#e5e7eb;--border-l:#f3f4f6}
[data-theme="dark"]{--text:#f9fafb;--text-s:#d1d5db;--text-m:#9ca3af;--text-main:#f9fafb;--text-muted:#9ca3af;--bg:#030712;--bg-w:#0c0f1a;--bg-card:#0c0f1a;--bg-alt:#0a0f1d;--border:#1f2937;--border-l:#111827}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Inter','Noto Sans SC','PingFang SC',sans-serif;background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
button{cursor:pointer;font-family:inherit}
img{max-width:100%;display:block}

/* ===== NAVIGATION ===== */
.nav{position:fixed;top:0;left:0;right:0;height:64px;z-index:100;background:rgba(255,255,255,0.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);transition:background .3s}
[data-theme="dark"] .nav{background:rgba(3,7,18,0.92);border-color:var(--border)}
.nav-in{max-width:1280px;margin:0 auto;height:100%;display:flex;align-items:center;justify-content:space-between;padding:0 40px}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:var(--text-main);text-decoration:none}
.nav-logo .mark{width:36px;height:36px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:16px;flex-shrink:0}
.nav-links{display:flex;align-items:center;gap:28px;list-style:none}
.nav-links a{color:var(--text-muted);text-decoration:none;font-size:14px;font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--primary)}
.nav-right{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;background:none;border:none;color:var(--text-main);padding:4px;cursor:pointer;flex-direction:column;gap:5px;width:40px;height:40px;align-items:center;justify-content:center}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--text-main);border-radius:2px;transition:.3s}
.nav-toggle.active span:first-child{transform:rotate(45deg) translate(5px,5px)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:last-child{transform:rotate(-45deg) translate(5px,-5px)}
.theme-btn{width:36px;height:36px;border-radius:8px;border:1px solid var(--border);background:transparent;color:var(--text-muted);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s}
.theme-btn:hover{background:var(--border-l)}
.home-btn{display:none;width:40px;height:40px;border-radius:8px;border:none;background:none;color:var(--text-main);align-items:center;justify-content:center;cursor:pointer;transition:background .2s;text-decoration:none}
.home-btn:hover{background:var(--bg-alt)}
@media(max-width:768px){.home-btn{display:flex!important}}
.sun,.moon{width:18px;height:18px}
[data-theme="dark"] .sun{display:none}
[data-theme="light"] .moon{display:none}



/* ===== HERO ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden;background:linear-gradient(135deg,#0c1222 0%,#162044 30%,#1d4ed8 70%,#3b82f6 100%);padding-top:64px}
.hero canvas{position:absolute;inset:0;z-index:1}
.hero-inner{position:relative;z-index:10;max-width:1280px;margin:0 auto;padding:0 40px;display:grid;grid-template-columns:1.1fr .9fr;gap:80px;align-items:center;width:100%}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,0.08);backdrop-filter:blur(12px);color:#93c5fd;padding:8px 20px;border-radius:100px;font-size:13px;font-weight:500;margin-bottom:24px;border:1px solid rgba(255,255,255,0.06)}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:#10b981;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{font-size:clamp(2.8rem,5.5vw,4.2rem);font-weight:800;line-height:1.08;color:#fff;margin-bottom:20px;letter-spacing:-2px}
.hero h1 .hl{background:linear-gradient(135deg,#93c5fd,#c4b5fd);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-desc{font-size:17px;color:rgba(200,210,240,0.75);line-height:1.8;max-width:540px;margin-bottom:32px}
.hero-btns{display:flex;gap:16px;margin-bottom:40px;flex-wrap:wrap}
.hero-v{display:flex;justify-content:center;align-items:center}
.phone{width:280px;height:540px;background:linear-gradient(180deg,#1a1f36,#0d1021);border-radius:36px;padding:12px;box-shadow:0 40px 80px rgba(0,0,0,0.5),inset 0 1px 0 rgba(255,255,255,0.08);position:relative;transform:scale(0.85)}
.phone::before{content:'';position:absolute;top:16px;left:50%;transform:translateX(-50%);width:100px;height:24px;background:#0d1021;border-radius:0 0 16px 16px;z-index:10}
.phone-scr{width:100%;height:100%;background:linear-gradient(180deg,#23284a,#15192e);border-radius:28px;overflow:hidden;padding:40px 16px 16px;display:flex;flex-direction:column;gap:8px}
.chat-in{background:rgba(255,255,255,0.06);color:rgba(255,255,255,0.8);align-self:flex-start;padding:8px 14px;border-radius:16px;border-bottom-left-radius:4px;font-size:11px;max-width:80%}
.chat-out{background:linear-gradient(135deg,#2563eb,#3b82f6);color:#fff;align-self:flex-end;padding:8px 14px;border-radius:16px;border-bottom-right-radius:4px;font-size:11px;max-width:80%}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;text-decoration:none;transition:all .2s;border:none}
.btn-w{background:#fff;color:#1d4ed8;padding:14px 32px}
.btn-w:hover{background:#f0f4ff;transform:translateY(-1px)}
.btn-o{background:rgba(255,255,255,0.06);color:#fff;border:1px solid rgba(255,255,255,0.12);padding:14px 32px}
.btn-o:hover{background:rgba(255,255,255,0.12)}
.btn-p{background:var(--primary);color:#fff;padding:14px 32px}
.btn-p:hover{background:#1d4ed8;transform:translateY(-1px)}

/* ===== SECTIONS ===== */
.sect{max-width:1280px;margin:0 auto;padding:80px 40px}
.sect-header{text-align:center;margin-bottom:56px}
.sect-label{font-size:12px;letter-spacing:3px;color:var(--primary);text-transform:uppercase;font-weight:600;margin-bottom:12px;display:block}
.sect-header h2{font-size:clamp(1.8rem,3.5vw,2.4rem);font-weight:700;margin-bottom:14px;letter-spacing:-0.5px}
.sect-header p{color:var(--text-m);font-size:16px;max-width:600px;margin:0 auto;line-height:1.7}

/* ===== GRID ===== */
.g3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.g2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.g4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.g5{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}

/* ===== CARDS ===== */
.card{background:var(--bg-w);border:1px solid var(--border);border-radius:16px;transition:all .3s}
.card:hover{transform:translateY(-4px);box-shadow:0 20px 60px rgba(0,0,0,0.06)}

/* ===== PAIN POINTS ===== */
.pain{padding:32px;border-left:4px solid #EF4444}
.pain:nth-child(2){border-left-color:#F59E0B}
.pain:nth-child(3){border-left-color:#3B82F6}
.pain:nth-child(4){border-left-color:#10B981}
.pain:nth-child(5){border-left-color:#8B5CF6}
.pain:nth-child(6){border-left-color:#EC4899}
.pain-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.pain-icon svg{width:22px;height:22px}
.pain h3{font-size:17px;font-weight:700;margin-bottom:10px}
.pain p{color:var(--text-m);font-size:14px;line-height:1.7}

/* ===== STRENGTHS ===== */
.str{padding:36px 28px;display:flex;gap:18px;align-items:flex-start}
.str-icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.str-icon svg{width:24px;height:24px}
.str h3{font-size:17px;font-weight:700;margin-bottom:8px}
.str p{color:var(--text-m);font-size:14px;line-height:1.7}

/* ===== PRODUCTS ===== */
.prod{padding:0;overflow:hidden}
.prod-h{height:150px;display:flex;align-items:center;justify-content:center;position:relative}
.prod-h .tag{position:absolute;top:16px;right:16px;background:rgba(255,255,255,0.2);backdrop-filter:blur(10px);padding:4px 12px;border-radius:20px;font-size:11px;color:#fff;font-weight:500}
.prod-body{padding:28px 24px}
.prod-body h3{font-size:20px;font-weight:700;margin-bottom:8px}
.prod-body .sub{color:var(--text-m);font-size:14px;margin-bottom:20px;line-height:1.6}
.prod-tags{display:flex;flex-wrap:wrap;gap:8px}
.prod-tags span{font-size:12px;padding:4px 10px;background:var(--bg-alt);border-radius:6px;color:var(--text-m)}
.prod-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 24px;border-radius:10px;font-size:14px;font-weight:600;cursor:pointer;border:none;margin-top:12px}

/* ===== THREE VERSIONS ===== */
.ver-card{background:var(--bg-w);border:1px solid var(--border);border-radius:20px;padding:36px 28px;text-align:center;transition:all .35s;position:relative;overflow:hidden}
.ver-card:hover{transform:translateY(-6px);box-shadow:0 24px 64px rgba(0,0,0,0.08)}
.ver-card .badge{display:inline-block;font-size:11px;font-weight:700;padding:5px 16px;border-radius:100px;margin-bottom:20px;letter-spacing:1px;text-transform:uppercase}
.ver-card h3{font-size:22px;font-weight:700;margin-bottom:12px}
.ver-card .price{font-size:32px;font-weight:800;color:var(--primary);margin-bottom:8px}
.ver-card .price-note{font-size:13px;color:var(--text-m);margin-bottom:24px}
.ver-card ul{list-style:none;text-align:left;margin-bottom:24px}
.ver-card ul li{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-s);padding:8px 0;border-bottom:1px solid var(--border-l)}
.ver-card ul li:last-child{border-bottom:none}
.ver-card ul li svg{color:#10b981;flex-shrink:0}

/* ===== COMPARISON ===== */
.comp-wrap{overflow:auto;border-radius:16px;border:1px solid var(--border);background:var(--bg-w)}
.comp-head{display:grid;grid-template-columns:1.4fr 1fr 1fr;align-items:center;background:var(--bg-alt);border-bottom:1px solid var(--border)}
.comp-head > div{padding:16px 24px;font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}
.comp-head > div:nth-child(2){color:var(--primary)}
.comp-head > div:nth-child(3){color:var(--text-m)}
.comp-row{display:grid;grid-template-columns:1.4fr 1fr 1fr;align-items:center;border-bottom:1px solid var(--border-l);transition:background .2s}
.comp-row:last-child{border-bottom:none}
.comp-row:hover{background:rgba(37,99,235,0.03)}
.comp-row > div{padding:16px 24px}
.comp-row > div:first-child{font-weight:600;font-size:14px}
.comp-row > div:nth-child(2){text-align:center;color:#10b981;font-weight:600;font-size:14px}
.comp-row > div:nth-child(3){text-align:center;color:var(--text-m);font-size:14px}

/* ===== TECH ===== */
.tech-card{background:var(--bg-w);border:1px solid var(--border);border-radius:20px;padding:40px}
.tg4{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.tg3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.t-item{background:var(--bg-alt);border:1px solid var(--border);border-radius:10px;padding:14px 8px;text-align:center;font-size:13px;font-weight:600;color:var(--text-main)}
.t-item .sub{font-size:11px;color:var(--text-m);font-weight:400;margin-top:4px}
.t-gate{background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:14px;padding:18px 28px;text-align:center;color:#fff;margin:16px 0}
.t-gate .sub{font-size:13px;color:rgba(255,255,255,0.8);margin-top:4px}

/* ===== STATS ===== */
.stats-bg{background:linear-gradient(135deg,#0c1222,#1d4ed8);padding:80px 40px;position:relative;overflow:hidden}
.stats-bg::before{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E")}
.stat-i{text-align:center;padding:36px 20px;border-radius:16px;background:rgba(255,255,255,0.04);border:1px solid rgba(255,255,255,0.06);backdrop-filter:blur(10px)}
.stat-i .n{font-size:clamp(2.2rem,4vw,3rem);font-weight:800;color:#fff;line-height:1;margin-bottom:8px}
.stat-i .lb{font-size:13px;color:rgba(180,200,255,0.5);font-weight:500}

/* ===== CLIENTS ===== */
.cli-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;max-width:960px;margin:0 auto}
.cli-card{display:flex;gap:16px;padding:28px;background:var(--bg-w);border:1px solid var(--border);border-radius:16px;transition:all .3s}
.cli-card:hover{box-shadow:0 8px 24px rgba(0,0,0,0.05)}
.cli-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0;color:#fff;font-weight:700;font-size:15px}
.cli-body h4{font-size:15px;font-weight:700;margin-bottom:6px}
.cli-body p{color:var(--text-m);font-size:14px;line-height:1.7;margin-bottom:8px}
.cli-body span{font-size:12px;color:var(--text-m)}

/* ===== ABOUT ===== */
.ab-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:56px;align-items:start}
.ab-grid h3{font-size:22px;font-weight:700;margin-bottom:16px}
.ab-grid p{color:var(--text-m);font-size:15px;line-height:1.8;margin-bottom:14px}

/* ===== CTA ===== */
.cta-box{background:linear-gradient(135deg,#1d4ed8,#2563eb);border-radius:24px;padding:60px 40px;text-align:center;color:#fff;position:relative;overflow:hidden}
.cta-box::before{content:'';position:absolute;top:-50%;right:-20%;width:400px;height:400px;border-radius:50%;background:rgba(255,255,255,0.03)}
.cta-box h2{font-size:clamp(1.6rem,3vw,2.2rem);font-weight:700;margin-bottom:10px;position:relative}
.cta-box p{color:rgba(220,230,255,0.8);font-size:15px;margin-bottom:32px;position:relative;max-width:520px;margin-left:auto;margin-right:auto}

/* ===== FOOTER ===== */
.ft{background:#0c1222;color:#e2e8f0}
.ft-in{max-width:1280px;margin:0 auto;padding:64px 40px 32px;display:grid;grid-template-columns:1.8fr repeat(3,1fr);gap:48px}
.ft-brand .company{color:#fff;font-size:15px;font-weight:600;margin-top:12px;display:block}
.ft-brand p{color:rgba(226,232,240,0.35);font-size:14px;line-height:1.8;margin-top:8px}
.ft-col h4{font-size:12px;font-weight:600;color:rgba(226,232,240,0.5);margin-bottom:16px;letter-spacing:1px;text-transform:uppercase}
.ft-col a{display:block;color:rgba(226,232,240,0.35);font-size:14px;text-decoration:none;margin-bottom:10px;transition:color .2s}
.ft-col a:hover{color:#93bbfc}
.ft-bot{text-align:center;padding:24px 0;color:rgba(226,232,240,0.2);font-size:12px;border-top:1px solid rgba(226,232,240,0.06)}

/* ===== ANIMATIONS ===== */
.fade{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.fade.v{opacity:1;transform:translateY(0)}

/* ===== RESPONSIVE: TABLET ===== */
@media(max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-v{display:none}
  .g3,.g2{grid-template-columns:repeat(2,1fr)}
  .g4{grid-template-columns:repeat(2,1fr)}
  .g5{grid-template-columns:repeat(3,1fr)}
  .ab-grid{grid-template-columns:1fr}
  .cli-grid{grid-template-columns:1fr}
  .ft-in{grid-template-columns:1fr 1fr}
}

/* ===== RESPONSIVE: MOBILE ===== */
@media(max-width:768px){
  .nav-in{padding:0 20px}
  .nav-links{display:none!important}
  .nav-toggle{display:flex!important}

  .hero{min-height:auto;padding:80px 0 60px}
  .hero-inner{padding:0 20px}
  .hero h1{font-size:clamp(2rem,8vw,2.6rem);letter-spacing:-1px}
  .hero-desc{font-size:15px}
  .hero-btns{flex-direction:column;gap:12px}
  .hero-btns .btn{width:100%}
  .phone{display:none}
  .sect{padding:60px 20px}
  .sect-header{margin-bottom:40px}
  .sect-header h2{font-size:clamp(1.5rem,6vw,1.8rem)}
  .g3,.g2,.g4,.g5{grid-template-columns:1fr}
  .str{padding:24px 20px}
  .str-icon{width:44px;height:44px}
      .tech-card{padding:24px}
  .stat-i{padding:28px 16px}
  .ab-grid{grid-template-columns:1fr;gap:36px}
  .cta-box{padding:48px 24px}
  .ft-in{grid-template-columns:1fr;gap:32px;padding:48px 20px 24px}
}

/* 子页面banner */
.page-banner{background:linear-gradient(135deg,#2563EB,#6366F1);padding:120px 40px 80px;text-align:center;color:#fff;position:relative;overflow:hidden}
.page-banner::before{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E")}
.page-banner h1{font-size:clamp(2rem,4vw,3rem);font-weight:800;margin-bottom:16px;position:relative;letter-spacing:-1px}
.page-banner p{font-size:16px;color:rgba(255,255,255,0.85);max-width:640px;margin:0 auto;line-height:1.8;position:relative}
.breadcrumb{display:flex;align-items:center;gap:8px;margin-bottom:20px;justify-content:center;position:relative}
.breadcrumb a{color:rgba(255,255,255,0.7);font-size:14px;text-decoration:none;transition:color .2s}
.breadcrumb a:hover{color:#fff}
.breadcrumb span{color:rgba(255,255,255,0.4);font-size:14px}
/* 返回按钮 */
.back-btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;background:var(--bg-w);border:1px solid var(--border);border-radius:12px;font-size:14px;font-weight:600;color:var(--text-main);text-decoration:none;transition:all .2s;margin-bottom:32px}
.back-btn:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,0.08)}
/* 场景标签 */
.scenario-grid{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:24px}