/* ============================================
   值守精灵 Landing — Data Command Center
   Full dark · Massive type · Corner brackets
   Scanlines · Hex grid · Neon glow · Bento
   ============================================ */

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700;900&family=JetBrains+Mono:wght@400;600;800&display=swap');

/* --- CSS Variables --- */
:root {
  --abyss: #020617;
  --deep: #060b18;
  --surface: #0c1224;
  --elevated: #111827;
  --border: rgba(255,255,255,0.06);
  --border-active: rgba(0,212,255,0.25);
  --electric: #00d4ff;
  --electric-glow: rgba(0,212,255,0.35);
  --blue: #3b82f6;
  --blue-glow: rgba(59,130,246,0.3);
  --amber: #f59e0b;
  --amber-glow: rgba(245,158,11,0.3);
  --emerald: #22c55e;
  --emerald-glow: rgba(34,197,94,0.3);
  --red: #ef4444;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --text-muted: #64748b;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", "Consolas", monospace;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --- Reset --- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;background:var(--abyss)}
body{font-family:var(--font-body);background:var(--abyss);color:var(--text);line-height:1.6;overflow-x:hidden}

/* --- Global Scanline Overlay --- */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.03) 2px,
    rgba(0,0,0,0.03) 4px
  );
  opacity: 0.4;
}

/* --- Navigation --- */
.nav {
  position: fixed; top:0; left:0; right:0; z-index:1000;
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 48px;
  background:rgba(2,6,23,0.88);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid rgba(0,212,255,0.08);
  transition:all .3s;
}
.nav--scrolled{background:rgba(2,6,23,0.96);border-bottom-color:rgba(0,212,255,0.15);box-shadow:0 4px 32px rgba(0,0,0,0.4)}
.nav__brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.nav__logo{width:34px;height:34px;background:linear-gradient(135deg,var(--electric),var(--blue));border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:16px;color:#fff;box-shadow:0 0 16px var(--electric-glow)}
.nav__name{font-size:16px;font-weight:700;color:var(--text);letter-spacing:-.3px}
.nav__links{display:flex;gap:32px;list-style:none}
.nav__links a{text-decoration:none;font-size:13px;color:var(--text-dim);transition:color .2s;position:relative;font-weight:500}
.nav__links a::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:1.5px;background:var(--electric);transition:width .3s var(--ease-out)}
.nav__links a:hover{color:var(--text)}
.nav__links a:hover::after{width:100%}
.nav__cta{padding:8px 22px;background:rgba(0,212,255,0.1);color:var(--electric);border:1px solid rgba(0,212,255,0.25);border-radius:6px;font-size:13px;font-weight:600;cursor:pointer;font-family:var(--font-body);transition:all .3s var(--ease-out)}
.nav__cta:hover{background:rgba(0,212,255,0.18);border-color:var(--electric);box-shadow:0 0 24px var(--electric-glow);transform:translateY(-1px)}

/* --- Section Base --- */
.section{position:relative;padding:120px 48px;overflow:hidden;min-height:100vh;display:flex;flex-direction:column;justify-content:center}
.section__label{display:block;text-align:center;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:4px;color:var(--electric);margin-bottom:16px;font-family:var(--font-mono)}
.section__title{text-align:center;font-size:clamp(28px,5vw,44px);font-weight:900;margin-bottom:16px;letter-spacing:-1px;color:var(--text);line-height:1.2}
.section__subtitle{text-align:center;font-size:15px;color:var(--text-dim);max-width:560px;margin:0 auto 64px;line-height:1.7}

/* --- Canvas Layers --- */
.canvas-layer{position:absolute;inset:0;z-index:0;pointer-events:none}

/* --- Hex Grid Overlay --- */
.hex-grid{position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.04;
  background-image:url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 0l25.98 15v30L30 60 4.02 45V15z' fill='none' stroke='%2300d4ff' stroke-width='0.5'/%3E%3C/svg%3E");
  background-size:60px 60px;
  mask-image:radial-gradient(ellipse 70% 70% at 50% 50%,black 30%,transparent 70%);
  -webkit-mask-image:radial-gradient(ellipse 70% 70% at 50% 50%,black 30%,transparent 70%);
}
.dots-grid{position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.06;
  background-image:radial-gradient(circle,rgba(0,212,255,0.8) 1px,transparent 1px);
  background-size:40px 40px;
  mask-image:radial-gradient(ellipse 70% 70% at 50% 50%,black 30%,transparent 70%);
  -webkit-mask-image:radial-gradient(ellipse 70% 70% at 50% 50%,black 30%,transparent 70%);
}

/* --- Corner Brackets --- */
.corner-brackets{position:relative}
.corner-brackets::before,.corner-brackets::after{content:'';position:absolute;width:20px;height:20px;pointer-events:none;z-index:2;transition:all .5s var(--ease-out)}
.corner-brackets::before{top:-1px;left:-1px;border-top:2px solid var(--electric);border-left:2px solid var(--electric)}
.corner-brackets::after{bottom:-1px;right:-1px;border-bottom:2px solid var(--electric);border-right:2px solid var(--electric)}
.corner-brackets:hover::before,.corner-brackets:hover::after{width:32px;height:32px;border-color:var(--electric);box-shadow:0 0 8px var(--electric-glow)}

/* --- Decorative Ring --- */
.deco-ring{position:absolute;border:1px solid rgba(0,212,255,0.04);border-radius:50%;pointer-events:none;z-index:0}

/* --- Glow Orbs --- */
.glow-orb{position:absolute;border-radius:50%;pointer-events:none;z-index:0;filter:blur(80px);opacity:.15;transition:transform 0.4s ease-out}
.glow-orb--blue{background:var(--blue);width:400px;height:400px}
.glow-orb--cyan{background:var(--electric);width:300px;height:300px}
.glow-orb--amber{background:var(--amber);width:250px;height:250px}

/* --- Hex Grid (parallax-ready) --- */
.hex-grid{transition:transform 0.4s ease-out}

/* --- Hero Content (parallax-ready) --- */
.hero__content{transition:transform 0.3s ease-out}
.hero__stats{transition:transform 0.3s ease-out}

/* ============================================
   HERO — Full Viewport Command Center
   ============================================ */
.hero{padding:0 48px;text-align:center;position:relative}
.hero__content{position:relative;z-index:2;max-width:900px;margin:0 auto}
.hero__eyebrow{display:inline-flex;align-items:center;gap:10px;padding:5px 18px;background:rgba(0,212,255,0.06);border:1px solid rgba(0,212,255,0.15);border-radius:100px;font-size:12px;color:var(--electric);font-weight:500;margin-bottom:28px;letter-spacing:1px;font-family:var(--font-mono)}
.hero__eyebrow-dot{width:6px;height:6px;background:var(--electric);border-radius:50%;animation:pulse-dot 2s ease-in-out infinite}
@keyframes pulse-dot{0%,100%{opacity:1;box-shadow:0 0 6px var(--electric)}50%{opacity:.4;box-shadow:0 0 2px var(--electric)}}
.hero__title{font-size:clamp(36px,8vw,80px);font-weight:900;line-height:1.08;letter-spacing:-2px;color:var(--text);margin-bottom:20px}
.hero__title-gradient{background:linear-gradient(135deg,var(--electric) 0%,#60a5fa 40%,var(--blue) 70%,#a78bfa 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero__hook{font-size:clamp(14px,2vw,18px);color:var(--text-dim);margin-bottom:6px;font-weight:400;line-height:1.6}
.hero__desc{font-size:14px;color:var(--text-muted);margin-bottom:40px}
.hero__actions{display:flex;gap:16px;justify-content:center;margin-bottom:72px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;border:none;font-family:var(--font-body);transition:all .3s var(--ease-out);text-decoration:none;position:relative;overflow:hidden}
.btn--primary{background:linear-gradient(135deg,var(--electric),var(--blue));color:#020617;font-weight:700;box-shadow:0 0 32px var(--electric-glow)}
.btn--primary:hover{box-shadow:0 0 48px var(--electric-glow);transform:translateY(-2px)}
.btn--primary::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,transparent,rgba(255,255,255,0.15),transparent);transform:translateX(-100%);transition:transform .6s}
.btn--primary:hover::after{transform:translateX(100%)}
.btn--ghost{background:transparent;color:var(--text);border:1px solid rgba(255,255,255,0.12)}
.btn--ghost:hover{border-color:var(--electric);color:var(--electric);background:rgba(0,212,255,0.04);box-shadow:0 0 20px rgba(0,212,255,0.08)}
.btn__icon{width:16px;height:16px}

/* Hero Stats — HUD Style */
.hero__stats{display:flex;justify-content:center;gap:clamp(20px,5vw,64px);flex-wrap:wrap}
.hero__stat{text-align:center;position:relative}
.hero__stat-value{font-size:clamp(28px,5vw,48px);font-weight:900;color:var(--text);font-family:var(--font-mono);letter-spacing:-2px;line-height:1;margin-bottom:6px;position:relative;display:inline-block}
.hero__stat-value--cyan{color:var(--electric);text-shadow:0 0 40px var(--electric-glow)}
.hero__stat-value--emerald{color:var(--emerald);text-shadow:0 0 40px var(--emerald-glow)}
.hero__stat-label{font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:2px;font-family:var(--font-mono)}

/* HUD Data Lines */
.hud-line{position:absolute;z-index:1;pointer-events:none;font-family:var(--font-mono);font-size:10px;color:rgba(0,212,255,0.15);letter-spacing:1px;white-space:nowrap}
.hud-line--left{left:40px;top:50%;transform:translateY(-50%) rotate(-90deg);transform-origin:center center}
.hud-line--right{right:40px;top:50%;transform:translateY(-50%) rotate(90deg);transform-origin:center center}

/* Scroll Indicator */
.scroll-indicator{position:absolute;bottom:36px;left:50%;transform:translateX(-50%);z-index:2;display:flex;flex-direction:column;align-items:center;gap:8px}
.scroll-indicator__mouse{width:22px;height:36px;border:2px solid rgba(255,255,255,0.15);border-radius:11px;position:relative}
.scroll-indicator__mouse::after{content:'';position:absolute;top:6px;left:50%;transform:translateX(-50%);width:3px;height:8px;background:var(--electric);border-radius:2px;animation:scroll-wheel 1.8s ease-in-out infinite}
@keyframes scroll-wheel{0%{opacity:1;top:6px}100%{opacity:0;top:22px}}
.scroll-indicator__text{font-size:10px;color:var(--text-muted);letter-spacing:3px;font-family:var(--font-mono);text-transform:uppercase;animation:float-text 2.5s ease-in-out infinite}
@keyframes float-text{0%,100%{opacity:.5}50%{opacity:1}}

/* ============================================
   FEATURES — Bento Grid with Brackets
   ============================================ */
.features{background:var(--deep)}
.features__bento{display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:auto auto;gap:20px;max-width:1100px;margin:0 auto;position:relative;z-index:1}
.feature-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:32px 28px;position:relative;transition:all .4s var(--ease-out)}
.feature-card:hover{transform:translateY(-6px);border-color:rgba(0,212,255,0.2);box-shadow:0 16px 48px rgba(0,0,0,0.5),0 0 0 1px rgba(0,212,255,0.08) inset}
.feature-card--large{grid-column:span 2}
.feature-card--full{grid-column:1/-1}
.feature-card__icon{width:48px;height:48px;border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:20px;position:relative}
.feature-card__icon::after{content:'';position:absolute;inset:-4px;border-radius:14px;border:1px solid transparent;transition:all .5s var(--ease-out)}
.feature-card:hover .feature-card__icon::after{border-color:currentColor;opacity:.3}
.feature-card__icon svg{width:24px;height:24px;position:relative;z-index:1}
.feature-card__icon--cyan{background:rgba(0,212,255,0.08);color:var(--electric)}
.feature-card__icon--blue{background:rgba(59,130,246,0.08);color:var(--blue)}
.feature-card__icon--emerald{background:rgba(34,197,94,0.08);color:var(--emerald)}
.feature-card__icon--amber{background:rgba(245,158,11,0.08);color:var(--amber)}
.feature-card__icon--purple{background:rgba(139,92,246,0.08);color:#8b5cf6}
.feature-card__icon--red{background:rgba(239,68,68,0.08);color:var(--red)}
.feature-card__title{font-size:16px;font-weight:700;color:var(--text);margin-bottom:8px;letter-spacing:-.3px}
.feature-card__desc{font-size:13px;color:var(--text-dim);line-height:1.7}
.feature-card__index{position:absolute;top:16px;right:20px;font-family:var(--font-mono);font-size:11px;color:rgba(255,255,255,0.06);font-weight:800}

/* ============================================
   ALGORITHM — Engine Room
   ============================================ */
.algorithm{background:var(--abyss);position:relative}
.algorithm__content{position:relative;z-index:1;max-width:1000px;margin:0 auto}
.algorithm__grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-bottom:48px}
.algo-panel{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:32px;position:relative;overflow:hidden;transition:all .4s var(--ease-out)}
.algo-panel:hover{border-color:rgba(255,255,255,0.1)}
.algo-panel__label{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:3px;margin-bottom:20px;font-family:var(--font-mono);display:flex;align-items:center;gap:8px}
.algo-panel__label::before{content:'';width:8px;height:8px;border-radius:2px}
.algo-panel__label--hard{color:var(--electric)}
.algo-panel__label--hard::before{background:var(--electric);box-shadow:0 0 8px var(--electric)}
.algo-panel__label--soft{color:var(--emerald)}
.algo-panel__label--soft::before{background:var(--emerald);box-shadow:0 0 8px var(--emerald)}
.algo-panel__list{list-style:none;display:flex;flex-direction:column;gap:12px}
.algo-panel__item{font-size:13px;color:var(--text-dim);display:flex;align-items:flex-start;gap:10px;line-height:1.5}
.algo-panel__marker{flex-shrink:0;width:18px;height:18px;border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:700;margin-top:1px}
.algo-panel__marker--cyan{background:rgba(0,212,255,0.12);color:var(--electric)}
.algo-panel__marker--green{background:rgba(34,197,94,0.12);color:var(--emerald)}

/* Comparison */
.comparison{display:flex;align-items:center;gap:32px;max-width:900px;margin:0 auto}
.comparison__side{flex:1;border-radius:14px;padding:32px 28px;text-align:center;transition:all .4s var(--ease-out);position:relative;overflow:hidden}
.comparison__side:hover{transform:scale(1.03)}
.comparison__side--before{background:rgba(239,68,68,0.04);border:1px solid rgba(239,68,68,0.12)}
.comparison__side--after{background:rgba(34,197,94,0.04);border:1px solid rgba(34,197,94,0.12)}
.comparison__label{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:3px;margin-bottom:16px;font-family:var(--font-mono)}
.comparison__label--before{color:var(--red)}
.comparison__label--after{color:var(--emerald)}
.comparison__value{font-size:52px;font-weight:900;color:var(--text);font-family:var(--font-mono);letter-spacing:-2px;margin-bottom:8px}
.comparison__value--green{color:var(--emerald);text-shadow:0 0 40px var(--emerald-glow)}
.comparison__desc{font-size:12px;color:var(--text-muted);line-height:1.6}
.comparison__arrow{font-size:32px;color:var(--text-muted);flex-shrink:0;animation:arrow-pulse 2s ease-in-out infinite}
@keyframes arrow-pulse{0%,100%{opacity:.3;transform:scale(1)}50%{opacity:1;transform:scale(1.15);color:var(--electric)}}

/* ============================================
   WORKFLOW — Animated Sequence
   ============================================ */
.workflow{background:var(--deep)}
.workflow__track{display:flex;align-items:flex-start;justify-content:center;gap:0;max-width:900px;margin:0 auto;position:relative;z-index:1}
.workflow__step{flex:1;text-align:center;position:relative}
.workflow__node{position:relative;display:flex;align-items:center;justify-content:center;margin-bottom:24px}
.workflow__ring{width:80px;height:80px;position:relative}
.workflow__ring-outer{fill:none;stroke:rgba(255,255,255,0.06);stroke-width:2}
.workflow__ring-inner{fill:none;stroke:var(--electric);stroke-width:2;stroke-linecap:round;filter:drop-shadow(0 0 6px var(--electric-glow));transition:stroke-dashoffset 1.4s var(--ease-out)}
.workflow__num{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:900;color:var(--text);font-family:var(--font-mono)}
.workflow__connector{position:absolute;top:40px;left:calc(50% + 40px);width:calc(100% - 80px);height:1px;background:linear-gradient(90deg,rgba(0,212,255,0.3),rgba(0,212,255,0.05));z-index:0;transform-origin:left;transition:transform 1s var(--ease-out);transform:scaleX(0)}
.workflow__connector--active{transform:scaleX(1)}
.workflow__step-title{font-size:16px;font-weight:700;color:var(--text);margin-bottom:6px}
.workflow__step-desc{font-size:13px;color:var(--text-dim);line-height:1.6}

/* ============================================
   CTA — Final Transmission
   ============================================ */
.cta{background:var(--abyss);text-align:center;position:relative}
.cta__bg{position:absolute;inset:0;z-index:0;pointer-events:none;background:radial-gradient(ellipse 60% 50% at 50% 50%,rgba(0,212,255,0.06) 0%,transparent 70%)}
.cta__content{position:relative;z-index:1}
.cta__title{font-size:clamp(24px,4vw,36px);font-weight:900;color:var(--text);margin-bottom:12px}
.cta__subtitle{font-size:15px;color:var(--text-dim);margin-bottom:48px}
.cta__qrcode-wrap{display:flex;align-items:center;justify-content:center;gap:32px}
.cta__qrcode{width:130px;height:130px;background:rgba(255,255,255,0.03);border:1px solid rgba(0,212,255,0.15);border-radius:14px;display:flex;align-items:center;justify-content:center;position:relative;animation:qr-glow 3s ease-in-out infinite}
.cta__qrcode::after{content:'';position:absolute;inset:-2px;border-radius:16px;border:1px solid rgba(0,212,255,0.08);animation:qr-ring 3s ease-in-out infinite}
@keyframes qr-glow{0%,100%{box-shadow:0 0 20px rgba(0,212,255,0.08)}50%{box-shadow:0 0 40px rgba(0,212,255,0.2)}}
@keyframes qr-ring{0%,100%{opacity:.3}50%{opacity:1}}
.cta__qrcode-inner{width:90px;height:90px;background:repeating-linear-gradient(0deg,rgba(255,255,255,0.05) 0px,rgba(255,255,255,0.05) 8px,transparent 8px,transparent 16px),repeating-linear-gradient(90deg,rgba(255,255,255,0.05) 0px,rgba(255,255,255,0.05) 8px,transparent 8px,transparent 16px);border-radius:4px}
.cta__text-info{text-align:left}
.cta__text-label{font-size:12px;color:var(--text-muted);margin-bottom:4px;font-family:var(--font-mono);letter-spacing:1px}
.cta__text-name{font-size:24px;font-weight:800;color:var(--text);margin-bottom:4px}
.cta__text-hint{font-size:12px;color:var(--text-muted)}

/* ============================================
   FOOTER
   ============================================ */
.footer{background:var(--abyss);border-top:1px solid var(--border);padding:24px 48px;display:flex;justify-content:space-between;align-items:center;position:relative;z-index:1}
.footer__copy{font-size:12px;color:var(--text-muted);font-family:var(--font-mono)}
.footer__links{display:flex;gap:24px;list-style:none}
.footer__links a{text-decoration:none;font-size:12px;color:var(--text-muted);transition:color .2s}
.footer__links a:hover{color:var(--text-dim)}

/* ============================================
   SCROLL REVEAL ANIMATIONS
   ============================================ */
.reveal{opacity:0;transform:translateY(40px);transition:opacity .8s var(--ease-out),transform .8s var(--ease-out)}
.reveal-stagger>*{opacity:0;transform:translateY(40px);transition:opacity .7s var(--ease-out),transform .7s var(--ease-out)}
.reveal-typing{opacity:0;transform:translateX(-12px);transition:opacity .5s ease-out,transform .5s ease-out}
.reveal-scale{opacity:0;transform:scale(.85);transition:opacity .7s var(--ease-out),transform .7s var(--ease-spring)}
.reveal--visible,.reveal-stagger>.reveal--visible{opacity:1;transform:translateY(0)}
.reveal-typing--visible{opacity:1;transform:translateX(0)}
.reveal-scale--visible{opacity:1;transform:scale(1)}

/* ============================================
   RESPONSIVE
   ============================================ */
@media(max-width:1024px){
  .features__bento{grid-template-columns:1fr 1fr}
  .feature-card--large{grid-column:span 2}
  .algorithm__grid{grid-template-columns:1fr}
  .comparison{flex-direction:column}
  .comparison__arrow{transform:rotate(90deg)}
  .hud-line{display:none}
}
@media(max-width:768px){
  .nav{padding:12px 20px}
  .nav__links{display:none}
  .section{padding:80px 20px;min-height:auto}
  .hero{padding:100px 20px 64px}
  .hero__title{font-size:clamp(28px,10vw,48px)}
  .hero__stats{gap:24px}
  .features__bento{grid-template-columns:1fr}
  .feature-card--large{grid-column:span 1}
  .workflow__track{flex-direction:column;align-items:center;gap:24px}
  .workflow__connector{display:none}
  .cta__qrcode-wrap{flex-direction:column;text-align:center}
  .cta__text-info{text-align:center}
  .footer{flex-direction:column;gap:12px;text-align:center}
  .comparison__value{font-size:40px}
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  html{scroll-behavior:auto}
  .reveal,.reveal-stagger>*,.reveal-typing,.reveal-scale{opacity:1;transform:none}
  .canvas-layer,.hex-grid,.dots-grid{display:none}
  body::after{display:none}
}