/* ===== CSS Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#1d2129;background:#fff;line-height:1.6;-webkit-font-smoothing:antialiased}
:root{--blue:#165DFF;--cyan:#36CFC9;--orange:#FF7D00;--green:#16b85e;--purple:#722ed1;--dark:#1d2129;--gray6:#f2f3f5;--gray4:#c9cdd4;--gray3:#e5e6eb;--gray2:#f7f8fa;--white:#fff;--max-w:1200px}
a{text-decoration:none;color:inherit}
img{max-width:100%;height:auto;display:block}
section{position:relative;overflow:hidden}

/* ===== Utilities ===== */
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.section-title{font-size:2rem;font-weight:700;text-align:center;margin-bottom:8px;color:var(--dark)}
.section-sub{font-size:1rem;text-align:center;color:#4e5969;margin-bottom:48px}
@media(max-width:768px){
  .section-title{font-size:1.5rem}
  .section-sub{margin-bottom:32px;font-size:0.95rem}
}

/* ===== Nav ===== */
.navbar{position:fixed;top:0;left:0;width:100%;z-index:1000;transition:background .3s,box-shadow .3s;background:rgba(255,255,255,.7);backdrop-filter:blur(12px)}
.navbar.scrolled{background:rgba(255,255,255,.98);box-shadow:0 2px 12px rgba(0,0,0,.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;max-width:var(--max-w);margin:0 auto;padding:0 24px}
.nav-logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.05rem;color:var(--dark)}
.nav-logo a{display:flex;align-items:center;gap:10px}
.nav-logo .logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--blue),var(--cyan));border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.2rem;font-weight:800}
.nav-menu{display:flex;gap:28px;list-style:none}
.nav-menu a{font-size:0.95rem;color:var(--dark);transition:color .2s;position:relative}
.nav-menu a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--blue);transition:width .25s}
.nav-menu a:hover{color:var(--blue)}
.nav-menu a:hover::after{width:100%}
.nav-actions{display:flex;gap:12px;align-items:center}
.btn-outline{padding:8px 20px;border:1px solid var(--blue);color:var(--blue);border-radius:6px;font-size:0.9rem;transition:all .25s;background:transparent;cursor:pointer}
.btn-outline:hover{background:var(--blue);color:#fff}
.btn-primary{padding:8px 24px;background:var(--blue);color:#fff;border:none;border-radius:6px;font-size:0.9rem;font-weight:600;transition:all .25s;cursor:pointer}
.btn-primary:hover{background:#0b4bd4;transform:translateY(-1px);box-shadow:0 4px 14px rgba(22,93,255,.35)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:4px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--dark);border-radius:2px;transition:all .25s}
@media(max-width:768px){
  .nav-menu{display:none;position:absolute;top:64px;left:0;width:100%;background:#fff;flex-direction:column;gap:0;box-shadow:0 8px 24px rgba(0,0,0,.08);padding:8px 0}
  .nav-menu.open{display:flex}
  .nav-menu a{display:block;padding:14px 24px;font-size:1rem}
  .nav-actions{display:none}
  .nav-toggle{display:flex}
}

/* ===== Banner (shared) ===== */
.banner{min-height:480px;display:flex;align-items:center;padding:100px 0 60px;margin-top:64px;position:relative}
.banner::before{content:'';position:absolute;inset:0;pointer-events:none}
.banner-grid{display:grid;grid-template-columns:55% 45%;gap:40px;align-items:center;position:relative;z-index:1}
.banner-text h1{font-size:2.4rem;font-weight:800;color:#fff;line-height:1.25;margin-bottom:12px}
.banner-text h2{font-size:1.2rem;font-weight:500;color:rgba(255,255,255,.85);margin-bottom:16px}
.banner-text p{font-size:1rem;color:rgba(255,255,255,.7);line-height:1.7;margin-bottom:32px;max-width:520px}
.banner-btns{display:flex;gap:16px;flex-wrap:wrap}
.banner-btns .btn-primary{background:#fff;padding:12px 32px;font-size:1rem}
.banner-btns .btn-primary:hover{background:rgba(255,255,255,.9);box-shadow:0 4px 20px rgba(255,255,255,.25)}
.btn-ghost{padding:12px 32px;border:1.5px solid rgba(255,255,255,.6);color:#fff;border-radius:6px;font-size:1rem;cursor:pointer;background:transparent;transition:all .25s}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.1)}
.banner-visual{display:flex;align-items:center;justify-content:center}
.visual-grid{width:100%;max-width:380px;aspect-ratio:1;position:relative}
@media(max-width:768px){
  .banner{min-height:auto;padding:80px 0 50px}
  .banner-grid{grid-template-columns:1fr;gap:32px}
  .banner-text h1{font-size:1.7rem;text-align:center}
  .banner-text h2{font-size:1.05rem;text-align:center}
  .banner-text p{text-align:center;margin:0 auto 28px}
  .banner-btns{justify-content:center}
  .visual-grid{max-width:240px;margin:0 auto}
}

/* ===== Overview ===== */
.overview{background:var(--gray2);padding:60px 0}
.overview .container{max-width:800px;text-align:center}
.overview p{font-size:1rem;color:#4e5969;line-height:1.8;margin-top:16px;text-align:left}
.ov-line{width:60px;height:3px;margin:16px auto 0;border-radius:2px}

/* ===== Features ===== */
.features{padding:70px 0}
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feat-card{background:#fff;border:1px solid var(--gray3);border-radius:12px;padding:32px 24px;transition:all .3s}
.feat-card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(22,93,255,.12);border-color:rgba(22,93,255,.2)}
.fc-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:16px}
.feat-card h3{font-size:1.05rem;font-weight:700;margin-bottom:10px;color:var(--dark)}
.feat-card p{font-size:0.9rem;color:#4e5969;line-height:1.6}
@media(max-width:992px){.feat-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:576px){.feat-grid{grid-template-columns:1fr}}

/* ===== Advantages (shared) ===== */
.advantages{padding:60px 0}
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.adv-card{text-align:center;padding:28px 16px;background:rgba(255,255,255,.7);border-radius:10px;transition:all .3s}
.adv-card:hover{background:#fff;transform:translateY(-4px)}
.adv-card .ac-icon{font-size:2rem;margin-bottom:10px;display:block}
.adv-card h4{font-size:0.95rem;font-weight:700;color:var(--dark);margin-bottom:6px}
.adv-card p{font-size:0.82rem;color:#4e5969;line-height:1.5}
@media(max-width:992px){.adv-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:576px){.adv-grid{grid-template-columns:repeat(2,1fr)}}

/* ===== Scenes ===== */
.scenes{padding:60px 0}
.scene-box{max-width:700px;margin:0 auto;text-align:center}
.scene-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-bottom:24px}
.scene-tags span{padding:10px 24px;background:var(--gray2);border-radius:8px;font-size:0.95rem;transition:all .3s}
.scene-tags span:hover{color:#fff;transform:translateY(-2px)}
.scene-desc{font-size:1rem;color:#4e5969;display:flex;flex-wrap:wrap;justify-content:center;gap:16px 32px}
.scene-desc span{font-size:0.95rem;padding:6px 0;position:relative}
.scene-desc span+span::before{content:'·';position:absolute;left:-18px}

/* ===== Value ===== */
.value{padding:50px 0;background:var(--gray2);text-align:center}
.value .container{max-width:700px}
.value p{font-size:1.05rem;color:#4e5969;line-height:1.9}

/* ===== CTA ===== */
.cta{padding:70px 0;text-align:center;color:#fff}
.cta h2{font-size:1.8rem;font-weight:700;margin-bottom:8px}
.cta p{font-size:1rem;opacity:.8;margin-bottom:36px}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;max-width:800px;margin:0 auto;text-align:left}
.cta-form{background:rgba(255,255,255,.12);backdrop-filter:blur(8px);border-radius:12px;padding:32px}
.cta-form h4{font-size:1.1rem;font-weight:600;margin-bottom:16px;color:#fff}
.cta-form input,.cta-form textarea{width:100%;padding:10px 14px;border:1px solid rgba(255,255,255,.2);border-radius:6px;background:rgba(255,255,255,.1);color:#fff;font-size:0.9rem;margin-bottom:12px;outline:none;transition:border .25s}
.cta-form input::placeholder,.cta-form textarea::placeholder{color:rgba(255,255,255,.5)}
.cta-form input:focus,.cta-form textarea:focus{border-color:#fff}
.cta-form textarea{min-height:80px;resize:vertical}
.cta-form .btn-primary{background:#fff;width:100%;padding:12px;font-size:1rem;font-weight:600}
.cta-form .btn-primary:hover{background:rgba(255,255,255,.9)}
.cta-contact{background:rgba(255,255,255,.08);border-radius:12px;padding:32px;display:flex;flex-direction:column;justify-content:center}
.cta-contact p{margin-bottom:8px;opacity:1;font-size:0.95rem;text-align:left}
.cta-contact strong{display:inline-block;min-width:70px}
@media(max-width:768px){
  .cta-grid{grid-template-columns:1fr;gap:20px}
  .cta h2{font-size:1.4rem}
}

/* ===== Footer ===== */
.footer{background:#1a1a2e;color:rgba(255,255,255,.7);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;margin-bottom:40px}
.footer-col h4{color:#fff;font-size:1rem;font-weight:600;margin-bottom:16px}
.footer-col ul{list-style:none}
.footer-col ul li{margin-bottom:8px;font-size:0.88rem;cursor:pointer;transition:color .2s}
.footer-col ul li:hover{color:var(--cyan)}
.footer-col p{font-size:0.88rem;margin-bottom:6px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;text-align:center;font-size:0.82rem;color:rgba(255,255,255,.4)}
@media(max-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.footer-grid{grid-template-columns:1fr}}

/* ===== Back link ===== */
.back-link{display:block;text-align:center;padding:12px 0;font-size:0.9rem;color:var(--blue);background:var(--gray2)}
.back-link a:hover{text-decoration:underline}

/* ===== Ring animation (GEO) ===== */
.vis-ring{position:absolute;border-radius:50%;border:2px solid rgba(255,255,255,.15)}
.vis-ring.r1{width:100%;height:100%;top:0;left:0;animation:spin 20s linear infinite}
.vis-ring.r2{width:68%;height:68%;top:16%;left:16%;border-color:rgba(54,207,201,.25);animation:spin-rev 15s linear infinite}
.vis-ring.r3{width:36%;height:36%;top:32%;left:32%;border-color:rgba(255,255,255,.2);animation:spin 12s linear infinite}
.vis-core{position:absolute;width:22%;height:22%;top:39%;left:39%;background:linear-gradient(135deg,var(--cyan),var(--blue));border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.8rem;font-weight:800;box-shadow:0 0 40px rgba(54,207,201,.4);animation:pulse 3s ease-in-out infinite}
.vis-dot{position:absolute;width:10px;height:10px;background:var(--cyan);border-radius:50%;box-shadow:0 0 10px rgba(54,207,201,.5)}
.vis-dot:nth-child(5){top:5%;left:50%;transform:translateX(-50%)}
.vis-dot:nth-child(6){top:50%;right:3%;transform:translateY(-50%)}
.vis-dot:nth-child(7){bottom:5%;left:50%;transform:translateX(-50%)}
.vis-dot:nth-child(8){top:50%;left:3%;transform:translateY(-50%)}
.vis-dot:nth-child(9){top:15%;right:12%}
.vis-dot:nth-child(10){bottom:15%;left:12%}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes spin-rev{to{transform:rotate(-360deg)}}
@keyframes pulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.08);opacity:.9}}

/* ===== Float cards (zhuanglipeng / beauty) ===== */
.vis-card,.vg-item{position:absolute;padding:8px 12px;background:rgba(255,255,255,.15);backdrop-filter:blur(6px);border-radius:10px;color:#fff;font-size:0.75rem;text-align:center;animation:float 4s ease-in-out infinite}
.vg-item{width:32%;padding:10px;font-size:0.85rem;border-radius:12px}
.vg-center{position:absolute;width:24%;height:24%;top:38%;left:38%;background:rgba(255,255,255,.2);backdrop-filter:blur(8px);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:2rem;animation:pulse 3s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

/* ===== CRM flow nodes ===== */
.vg-node{position:absolute;background:rgba(255,255,255,.15);backdrop-filter:blur(6px);border-radius:12px;color:#fff;text-align:center;font-size:0.8rem;padding:8px 12px;animation:float 4s ease-in-out infinite}