@font-face {
  font-family: "Inter";
  src: url("./fonts/Inter-Regular.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Inter";
  src: url("./fonts/Inter-Medium.woff2") format("woff2");
  font-weight: 500; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Inter";
  src: url("./fonts/Inter-SemiBold.woff2") format("woff2");
  font-weight: 600; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Inter";
  src: url("./fonts/Inter-Bold.woff2") format("woff2");
  font-weight: 700; font-style: normal; font-display: swap;
}

/* ===== Design Tokens ===== */
:root {
  --bg-deep: #020817;
  --bg-base: #060f1f;
  --bg-elevated: #0b172e;
  --bg-glass: rgba(11, 23, 46, 0.58);

  --text-primary: #f0f3fa;
  --text-secondary: #8899b4;
  --text-muted: #556580;

  --accent-gold: #4f8cff;
  --accent-gold-light: #7ab4ff;
  --accent-gold-glow: rgba(79, 140, 255, 0.2);
  --accent-blue: #3b82f6;
  --accent-cyan: #22d3ee;

  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-strong: rgba(255, 255, 255, 0.10);

  --nav-height: 68px;
  --container-max: 1160px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
}

/* ===== Reset ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:var(--nav-height)}
body{
  color:var(--text-primary);background:var(--bg-deep);
  font-family:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  line-height:1.6;min-height:100vh;overflow-x:hidden;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}

/* ===== Site Background ===== */
.site-background{position:fixed;inset:0;z-index:0;pointer-events:none}
.starfield{position:absolute;inset:0;background:radial-gradient(ellipse at 50% 50%,#0c1a33 0%,#020817 70%)}
.deep-vignette{position:absolute;inset:0;background:radial-gradient(ellipse at 50% 30%,transparent 40%,rgba(2,8,23,0.7) 100%)}

/* ===== Layout ===== */
.container{max-width:var(--container-max);margin:0 auto;padding:0 28px}
.section{position:relative;z-index:1;padding:100px 0}

.section-heading{text-align:center;margin-bottom:56px}
.section-tag{display:inline-block;font-size:13px;font-weight:600;color:var(--accent-gold-light);letter-spacing:3px;text-transform:uppercase;margin-bottom:12px}
.section-heading h2{font-size:clamp(26px,3.5vw,38px);font-weight:700;margin-bottom:12px;letter-spacing:-0.01em}
.section-desc{font-size:16px;color:var(--text-secondary);max-width:600px;margin:0 auto;line-height:1.7}

/* ===== Navigation ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--nav-height);background:rgba(6,15,31,0.84);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border-subtle)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%}
.brand{display:flex;align-items:center;gap:10px;z-index:1001}
.brand-logo{height:34px;width:auto}
.brand-text{font-size:17px;font-weight:600;color:var(--text-primary)}
.site-nav{display:flex;align-items:center;gap:36px}
.site-nav a{font-size:13.5px;font-weight:500;color:var(--text-secondary);transition:color .2s}
.site-nav a:hover{color:var(--text-primary)}
.nav-product{display:flex;align-items:center;gap:6px}
.site-nav a.nav-product{margin-left:-18px;padding-left:18px;border-left:1px solid rgba(255,255,255,0.35)}
.site-nav a.nav-product + a.nav-product{margin-left:0;padding-left:0;border-left:none}
.nav-product-icon{height:19px;width:auto;max-width:none;opacity:0.7;transition:opacity .2s}
.nav-product:hover .nav-product-icon{opacity:1}
.header-actions{display:flex;align-items:center;gap:12px}
.lang-toggle{background:none;border:1px solid var(--border-strong);color:var(--text-secondary);padding:5px 11px;border-radius:6px;font-size:12px;font-weight:600;cursor:pointer;transition:all .2s;font-family:inherit}
.lang-toggle:hover{color:var(--text-primary);border-color:var(--accent-gold)}
.menu-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px 4px;z-index:1001;flex-direction:column;gap:5px}
.menu-toggle span{display:block;width:22px;height:2px;background:var(--text-primary);border-radius:2px;transition:transform .3s,opacity .3s}
.menu-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle.active span:nth-child(2){opacity:0}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;gap:7px;padding:10px 24px;border-radius:var(--radius-sm);font-size:14px;font-weight:600;cursor:pointer;transition:all .25s;border:none;font-family:inherit;text-decoration:none;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--accent-gold) 0%,#2d6ad4 100%);color:#fff;box-shadow:0 4px 18px var(--accent-gold-glow)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 26px rgba(212,168,83,0.35)}
.btn-outline{background:transparent;color:var(--text-primary);border:1px solid var(--border-strong)}
.btn-outline:hover{border-color:var(--accent-gold);background:rgba(212,168,83,0.06)}
.btn-gold{background:rgba(212,168,83,0.12);color:var(--accent-gold-light);border:1px solid rgba(212,168,83,0.25)}
.btn-gold:hover{background:rgba(212,168,83,0.2);border-color:var(--accent-gold)}
.header-cta{padding:7px 18px;font-size:13px}

/* ===== Hero - Product Carousel ===== */
.hero-carousel{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:var(--nav-height) 0 0 0;overflow:hidden;position:relative}
.hero-slides{position:absolute;inset:0;padding-top:var(--nav-height)}
.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity .7s ease;pointer-events:none}
.hero-slide.active{opacity:1;pointer-events:auto}
.hero-slide-bg{position:absolute;inset:0;background-size:cover;background-position:center}
.hero-slide.active .hero-slide-bg{animation:hero-zoom 8s ease-out forwards}
@keyframes hero-zoom{from{transform:scale(1)}to{transform:scale(1.06)}}
.hero-slide-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(2,8,23,0.92) 0%,rgba(2,8,23,0.78) 50%,rgba(2,8,23,0.58) 100%)}
.hero-slide-content{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;text-align:center;justify-content:center;height:100%;padding:80px 40px;max-width:900px;margin:0 auto}
.hero-slide-logo{height:58px;width:auto;max-width:none;margin-bottom:32px}
.hero-slide-subhead{font-size:22px;font-weight:600;color:var(--text-primary);margin-bottom:16px;line-height:1.4;max-width:600px}
.hero-slide-keywords{font-size:15px;font-weight:500;color:var(--accent-gold-light);margin-bottom:40px;letter-spacing:2px}
.hero-highlights{list-style:none;display:flex;flex-direction:column;align-items:center;gap:18px;margin-bottom:48px}
.hero-highlights li{font-size:18px;color:var(--text-secondary);display:flex;align-items:center;gap:14px;font-weight:500}
.hero-highlights li::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--accent-gold);flex-shrink:0}

/* Arrows */
.hero-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:10;width:48px;height:48px;border-radius:50%;border:1px solid rgba(255,255,255,0.12);background:rgba(6,15,31,0.6);color:var(--text-primary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .25s;backdrop-filter:blur(6px)}
.hero-arrow:hover{border-color:var(--accent-gold);background:rgba(6,15,31,0.85);color:var(--accent-gold-light)}
.hero-arrow-left{left:24px}
.hero-arrow-right{right:24px}

/* Dots */
.hero-dots{display:none}

/* Scroll hint */
.hero-scroll-hint{position:absolute;bottom:22px;left:50%;transform:translateX(-50%);z-index:10;color:var(--text-muted);font-size:12px;display:flex;flex-direction:column;align-items:center;gap:4px;animation:bounce-hint 2s infinite}
@keyframes bounce-hint{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(8px)}}
.hero-scroll-hint .arrow{font-size:16px;color:var(--accent-gold-light)}

/* ===== Product Showcase ===== */
.product-showcase{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-bottom:64px}
.product-card{background:var(--bg-glass);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:40px 36px;text-align:center;transition:all .3s;display:flex;flex-direction:column;align-items:center;gap:20px}
.product-card:hover{border-color:rgba(79,140,255,0.2);transform:translateY(-2px)}
.product-card-logo{height:32px;width:auto;max-width:none}
.product-card-desc{font-size:16px;color:var(--text-secondary);line-height:1.5}

/* ===== Difference Grid ===== */
.diff-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.diff-card{background:var(--bg-glass);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:32px 24px;text-align:center;transition:all .3s}
.diff-card:hover{border-color:rgba(212,168,83,0.2);transform:translateY(-2px)}
.diff-icon{font-size:26px;color:var(--accent-gold-light);margin-bottom:14px}
.diff-card h4{font-size:16px;font-weight:600;margin-bottom:8px}
.diff-card p{font-size:14px;color:var(--text-muted);line-height:1.6}

/* ===== Scenario Grid ===== */
.scenario-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.scenario-card{background:var(--bg-glass);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);overflow:hidden;transition:all .3s}
.scenario-card:hover{border-color:rgba(212,168,83,0.2);transform:translateY(-2px)}
.scenario-visual{position:relative;height:230px;overflow:hidden}
.scenario-visual-bg{position:absolute;inset:0;background-size:cover;background-position:center;transition:transform .5s}
.scenario-card:hover .scenario-visual-bg{transform:scale(1.05)}
.scenario-visual-label{position:absolute;top:12px;right:12px;font-size:11px;font-weight:600;color:var(--accent-gold-light);background:rgba(6,15,31,0.8);padding:4px 10px;border-radius:4px;backdrop-filter:blur(4px)}
.scenario-card h4{font-size:17px;font-weight:600;padding:20px 24px 0;margin-bottom:8px}
.scenario-card p{font-size:14px;color:var(--text-secondary);padding:0 24px 24px;line-height:1.7}

/* ===== Partner Features ===== */
.partner-features{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-bottom:40px}
.partner-feature-item{background:var(--bg-glass);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:28px 24px;transition:all .3s}
.partner-feature-item:hover{border-color:rgba(212,168,83,0.15)}
.partner-feature-item h4{font-size:16px;font-weight:600;margin-bottom:8px}
.partner-feature-item p{font-size:14px;color:var(--text-muted);line-height:1.6}
.partner-cta-block{text-align:center}

/* ===== Contact / Footer ===== */
#contact{background:var(--bg-base);border-top:1px solid var(--border-subtle)}
.contact-grid{display:grid;grid-template-columns:1.5fr 1.5fr 1fr;gap:48px;padding-bottom:40px;border-bottom:1px solid var(--border-subtle);margin-bottom:28px}
.contact-brand p{font-size:14px;color:var(--text-secondary);line-height:1.7}
.contact-channels{display:flex;flex-direction:column;gap:20px}
.contact-item h5{font-size:14px;font-weight:600;margin-bottom:6px}
.contact-item p{font-size:14px;color:var(--text-secondary)}
.contact-hint{font-size:12px!important;color:var(--text-muted)!important;margin-top:2px}
.contact-qr h5{font-size:14px;font-weight:600;margin-bottom:12px}
.contact-qr img{width:110px;height:110px;border-radius:var(--radius-sm);border:1px solid var(--border-subtle)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--text-muted)}

/* ===== Scroll Reveal ===== */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s cubic-bezier(.16,1,.3,1),transform .6s cubic-bezier(.16,1,.3,1)}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-stagger>*{opacity:0;transform:translateY(26px);transition:opacity .6s cubic-bezier(.16,1,.3,1),transform .6s cubic-bezier(.16,1,.3,1)}
.reveal-stagger.visible>:nth-child(1){transition-delay:0s;opacity:1;transform:translateY(0)}
.reveal-stagger.visible>:nth-child(2){transition-delay:.08s;opacity:1;transform:translateY(0)}
.reveal-stagger.visible>:nth-child(3){transition-delay:.16s;opacity:1;transform:translateY(0)}
.reveal-stagger.visible>:nth-child(4){transition-delay:.24s;opacity:1;transform:translateY(0)}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .diff-grid{grid-template-columns:repeat(2,1fr)}
  .product-showcase{grid-template-columns:1fr}
  .scenario-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  :root{--nav-height:60px}
  .site-nav{position:fixed;top:0;right:-100%;width:280px;height:100vh;flex-direction:column;background:rgba(6,15,31,0.97);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);padding:100px 32px 40px;gap:24px;transition:right .35s ease;border-left:1px solid var(--border-subtle)}
  .site-nav.open{right:0}
  .menu-toggle{display:flex}

  .hero-slide-content{padding:60px 24px}
  .hero-slide-logo{height:38px}
  .hero-slide-subhead{font-size:17px}
  .hero-slide-keywords{font-size:13px}
  .hero-highlights li{font-size:16px}
  .hero-arrow{display:none}

  .diff-grid{grid-template-columns:1fr}
  .product-showcase{grid-template-columns:1fr}
  .scenario-grid{grid-template-columns:1fr}
  .partner-features{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}

  .section{padding:70px 0}
}