/* ===== 基础 ===== */
/* ===== 顶部滚动进度条 ===== */
.scroll-progress{
  position:fixed;top:0;left:0;height:2px;width:0;
  background:linear-gradient(90deg,#2f7bff,#5ef2ff);
  box-shadow:0 0 12px rgba(94,242,255,.6);
  z-index:200;transition:width .08s linear;
  pointer-events:none;
}

:root{
  --bg:#050b1a;
  --bg-2:#0a1430;
  --panel:rgba(255,255,255,.04);
  --panel-brd:rgba(120,170,255,.14);
  --text:#e8eefc;
  --text-dim:#9fb2d6;
  --blue:#2f7bff;
  --blue-2:#38d0ff;
  --cyan:#5ef2ff;
  --grad:linear-gradient(120deg,#2f7bff 0%,#38d0ff 55%,#5ef2ff 100%);
  --maxw:1680px;
  --radius:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;background:var(--bg)}
body{
  font-family:"Inter","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:transparent;
  color:var(--text);
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
.container{max-width:var(--maxw);margin:0 auto;padding:0 32px}

/* ===== 背景 ===== */
.bg-grid{
  position:fixed;inset:0;z-index:-2;
  background-image:
    linear-gradient(rgba(80,140,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(80,140,255,.05) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(ellipse at 50% 0%,#000 30%,transparent 80%);
}
.bg-glow{
  position:fixed;top:-20%;left:50%;transform:translateX(-50%);
  width:900px;height:600px;z-index:-1;pointer-events:none;
  background:radial-gradient(circle,rgba(47,123,255,.28),transparent 60%);
  filter:blur(40px);
}

/* ===== 3D Background Canvas ===== */
#bg3d{
  position:fixed;inset:0;width:100vw;height:100vh;z-index:-3;
  display:block;
}

/* ===== 导航 ===== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .3s,backdrop-filter .3s,border-color .3s;
  border-bottom:1px solid transparent;
}
.nav.is-stuck{
  background:rgba(5,11,26,.82);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--panel-brd);
}
.nav__inner{display:flex;align-items:center;justify-content:flex-start;height:72px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text)}
.brand__mark{
  width:40px;height:40px;border-radius:10px;
  display:grid;place-items:center;font-weight:800;letter-spacing:.5px;
  background:var(--grad);color:#04102a;font-size:16px;
  box-shadow:0 6px 18px rgba(47,123,255,.4);
}
.brand__text{font-weight:700;font-size:18px;letter-spacing:.5px;line-height:1.1}
.brand__text small{display:block;font-size:11px;color:var(--text-dim);font-weight:400;letter-spacing:2px}
.nav__links{display:flex;align-items:center;gap:26px}
.nav__links a{color:var(--text-dim);text-decoration:none;font-size:14.5px;transition:color .2s;position:relative}
.nav__links a:hover{color:var(--text)}
.nav__cta{
  color:#04102a!important;background:var(--grad);
  padding:9px 18px;border-radius:999px;font-weight:600;
  box-shadow:0 6px 16px rgba(47,123,255,.35);
}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav__toggle span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:.3s}

/* ===== 按钮 ===== */
.btn{
  position:relative;isolation:isolate;overflow:hidden;
  display:inline-flex;align-items:center;justify-content:center;
  padding:13px 28px;border-radius:999px;font-size:15px;font-weight:600;
  text-decoration:none;cursor:pointer;border:1px solid transparent;transition:.25s;
}
.btn::before{
  content:"";position:absolute;inset:0;z-index:-1;border-radius:inherit;
  background:linear-gradient(120deg,transparent 30%,rgba(255,255,255,.35) 50%,transparent 70%);
  background-size:220% 100%;background-position:200% 0;
  transition:background-position .85s ease;
  pointer-events:none;
}
.btn:hover::before{background-position:-200% 0}
.btn--primary{background:var(--grad);color:#04102a;box-shadow:0 8px 22px rgba(47,123,255,.4)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(47,123,255,.55)}
.btn--ghost{border-color:var(--panel-brd);color:var(--text);background:var(--panel)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px)}

/* ===== Hero ===== */
.hero{padding:110px 0 34px;position:relative;min-height:70vh}
.hero__title{font-family:"Orbitron","Inter",sans-serif}
.hero__inner{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}
.hero__badge{
  display:inline-block;padding:7px 16px;border-radius:999px;font-size:13px;letter-spacing:1px;
  color:var(--cyan);border:1px solid rgba(94,242,255,.3);background:rgba(94,242,255,.06);
  margin-bottom:22px;position:relative;overflow:hidden;
  animation:badgeBreath 3.4s ease-in-out infinite;
}
.hero__badge::after{
  content:"";position:absolute;inset:-1px;border-radius:inherit;pointer-events:none;
  background:linear-gradient(120deg,transparent 40%,rgba(94,242,255,.55) 50%,transparent 60%);
  background-size:220% 100%;background-position:200% 0;
  animation:badgeShine 3.6s linear infinite;
  mix-blend-mode:screen;
}
@keyframes badgeBreath{
  0%,100%{box-shadow:0 0 0 0 rgba(94,242,255,0);border-color:rgba(94,242,255,.3)}
  50%{box-shadow:0 0 18px 0 rgba(94,242,255,.25);border-color:rgba(94,242,255,.55)}
}
@keyframes badgeShine{0%{background-position:200% 0}100%{background-position:-200% 0}}
.hero__title{font-size:clamp(30px,4.6vw,54px);line-height:1.15;font-weight:800;letter-spacing:.5px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__lead{margin:24px 0 32px;color:var(--text-dim);font-size:17px;max-width:560px}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap}
.hero__stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:36px}
.stat b{display:block;font-size:30px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;display:inline-block;transform-origin:left center}
.bignum__cell b,.metric b,.side-big{display:inline-block;transform-origin:center}
.stat span{font-size:13px;color:var(--text-dim)}

/* Hero 3D HUD */
.hero__visual{
  position:relative;display:flex;flex-direction:column;justify-content:flex-end;
  min-height:380px;align-self:stretch;
}
/* 精简后的 HUD：状态点 + LIVE + AUTO·3D，悬浮胶囊 + 流光 */
.hud{
  position:relative;z-index:2;display:inline-flex;align-items:center;gap:10px;
  align-self:flex-end;
  padding:10px 16px 10px 12px;border-radius:999px;
  background:linear-gradient(160deg,rgba(20,36,72,.78),rgba(8,16,38,.72));
  border:1px solid var(--panel-brd);
  box-shadow:0 20px 50px rgba(0,0,0,.45),0 0 0 1px rgba(94,242,255,.06) inset;
  backdrop-filter:blur(8px);
  font-family:"Orbitron",sans-serif;font-size:11.5px;letter-spacing:1.4px;
  color:var(--text-dim);
  animation:float 5s ease-in-out infinite;
}
.hud::before{
  content:"";position:absolute;inset:0;border-radius:999px;pointer-events:none;
  background:linear-gradient(110deg,transparent 0%,rgba(94,242,255,.22) 45%,transparent 70%);
  background-size:200% 100%;background-position:200% 0;
  animation:hudShine 3.6s linear infinite;
  mix-blend-mode:screen;
}
@keyframes hudShine{0%{background-position:200% 0}100%{background-position:-200% 0}}
.hud__label{color:#fff;font-weight:600;letter-spacing:2px}
.hud__chip{
  font-size:10px;padding:3px 8px;border-radius:999px;
  border:1px solid rgba(94,242,255,.35);color:var(--cyan);
  background:rgba(94,242,255,.06);letter-spacing:1.4px;
  margin-left:2px;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

/* 雷达/声波圆环装饰 */
.hud__rings{position:absolute;right:24px;top:24px;width:90px;height:90px;pointer-events:none}
.hud__rings span{
  position:absolute;inset:0;border-radius:50%;
  border:1px solid rgba(94,242,255,.45);
  animation:ring 3.2s cubic-bezier(.2,.6,.2,1) infinite;
}
.hud__rings span:nth-child(2){animation-delay:1.05s}
.hud__rings span:nth-child(3){animation-delay:2.1s}
@keyframes ring{
  0%{transform:scale(.2);opacity:.9}
  100%{transform:scale(1.4);opacity:0}
}

.dot{width:9px;height:9px;border-radius:50%}
.dot--green{background:#37e08a;box-shadow:0 0 10px #37e08a;animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

/* ===== 通用 section ===== */
.section{padding:64px 0;position:relative}
.section--alt{background:linear-gradient(180deg,transparent,rgba(10,20,48,.5),transparent)}
/* 首屏 Coverage 区：在 Nav 下方保留更多呼吸空间 */
#coverage.section{padding-top:120px}
.section__head{text-align:center;max-width:820px;margin:0 auto 44px}
.section__kicker{display:inline-block;color:var(--cyan);font-size:13px;letter-spacing:3px;text-transform:uppercase;margin-bottom:12px}
.section__title{font-size:clamp(26px,3.4vw,38px);font-weight:800}
.section__sub{color:var(--text-dim);margin-top:12px;font-size:16px}

/* ===== 关于 ===== */
.about{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.about__text p{color:var(--text-dim);margin-bottom:18px;font-size:16px}
.about__text b{color:var(--cyan);font-weight:600}
.about__cards{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.mini-card{background:var(--panel);border:1px solid var(--panel-brd);border-radius:var(--radius);padding:22px;transition:.25s}
.mini-card:hover{transform:translateY(-4px);border-color:var(--blue);box-shadow:0 16px 36px rgba(0,0,0,.4)}
.mini-card h4{font-size:16px;margin-bottom:8px;color:var(--text)}
.mini-card p{font-size:13.5px;color:var(--text-dim)}

/* ===== 网格 ===== */
.grid{display:grid;gap:22px}
.grid--products{grid-template-columns:repeat(3,1fr)}
.grid--adv{grid-template-columns:repeat(3,1fr)}
.grid--modules{grid-template-columns:repeat(3,1fr)}
.grid--certs{grid-template-columns:repeat(4,1fr)}
.grid--culture{grid-template-columns:repeat(4,1fr)}

/* ===== 模块 ===== */
.module{background:var(--panel);border:1px solid var(--panel-brd);border-radius:var(--radius);padding:32px 22px;transition:.25s;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;min-height:200px}
.module:hover{transform:translateY(-6px);border-color:var(--blue);box-shadow:0 18px 40px rgba(0,0,0,.45)}
.module__icon{
  width:64px;height:64px;border-radius:16px;
  display:grid;place-items:center;
  color:var(--blue);
  background:linear-gradient(160deg,rgba(47,123,255,.18),rgba(56,208,255,.08));
  border:1px solid rgba(120,170,255,.25);
  margin-bottom:16px;
  transition:.25s;
}
.module__icon svg{width:32px;height:32px;display:block}
.module:hover .module__icon{color:#fff;background:linear-gradient(160deg,rgba(47,123,255,.55),rgba(56,208,255,.35));border-color:rgba(120,170,255,.6)}
.module h3{font-size:17px;margin-bottom:6px;font-weight:700}
.module p{color:var(--text-dim);font-size:13.5px;line-height:1.55;max-width:28ch;margin:0}

/* ===== 数据条 ===== */
.metrics{
   display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:56px;
   background:linear-gradient(135deg,rgba(47,123,255,.12),rgba(56,208,255,.06));
   border:1px solid var(--panel-brd);border-radius:20px;padding:36px 30px;
}
.metric{text-align:center}
.metric b{display:block;font-size:34px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.metric span{display:block;margin-top:6px;font-size:13.5px;color:var(--text-dim)}

/* ===== 产品 ===== */
.product{background:var(--panel);border:1px solid var(--panel-brd);border-radius:var(--radius);padding:28px;transition:.25s}
.product:hover{transform:translateY(-6px);border-color:var(--blue);box-shadow:0 18px 40px rgba(0,0,0,.45)}
.product__icon{font-size:32px;margin-bottom:14px}
.product h3{font-size:18px;margin-bottom:10px}
.product p{color:var(--text-dim);font-size:14px}

/* ===== 优势 ===== */
.adv{background:var(--panel);border:1px solid var(--panel-brd);border-radius:var(--radius);padding:26px;transition:.25s;position:relative;overflow:hidden}
.adv:hover{transform:translateY(-6px);border-color:var(--cyan)}
.adv__num{font-size:34px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;opacity:.85;margin-bottom:10px}
.adv h3{font-size:18px;margin-bottom:10px}
.adv p{color:var(--text-dim);font-size:14px}
.adv b{color:var(--cyan)}

/* ===== Trust Band ===== */
.trustband{padding:28px 0;border-top:1px solid var(--panel-brd);border-bottom:1px solid var(--panel-brd);background:rgba(10,20,48,.35)}
.trustband__label{text-align:center;color:var(--text-dim);font-size:12px;letter-spacing:3px;text-transform:uppercase;margin-bottom:18px}
.trustband__logos{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;align-items:center}
.trust-logo{
  display:flex;align-items:center;justify-content:center;height:52px;
  background:var(--panel);border:1px solid var(--panel-brd);border-radius:12px;
  font-weight:700;letter-spacing:1.5px;font-size:13.5px;color:var(--text-dim);
  transition:.25s;
}
.trust-logo:hover{color:var(--cyan);border-color:var(--blue)}

/* ===== Big Numbers ===== */
.bignum{
  display:grid;grid-template-columns:repeat(6,1fr);gap:0;
  background:linear-gradient(135deg,rgba(47,123,255,.10),rgba(56,208,255,.05));
  border:1px solid var(--panel-brd);border-radius:20px;overflow:hidden;
}
.bignum__cell{padding:28px 14px;text-align:center;border-right:1px solid var(--panel-brd)}
.bignum__cell:last-child{border-right:0}
.bignum b{display:block;font-size:28px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.1;font-family:"Orbitron",sans-serif}
.bignum span{display:block;margin-top:8px;font-size:12px;color:var(--text-dim);letter-spacing:.5px}

/* ===== Process Timeline ===== */
.process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:24px}
.step{
  position:relative;background:var(--panel);border:1px solid var(--panel-brd);
  border-radius:var(--radius);padding:26px 22px;transition:.25s;
}
.step:hover{border-color:var(--cyan);transform:translateY(-4px)}
.step__num{font-family:"Orbitron",sans-serif;font-size:12px;color:var(--cyan);letter-spacing:2px;margin-bottom:12px}
.step h3{font-size:16.5px;margin-bottom:8px}
.step p{color:var(--text-dim);font-size:13.5px}
.step__arrow{position:absolute;right:-12px;top:50%;transform:translateY(-50%);color:var(--blue);font-size:22px;z-index:2}
.step:last-child .step__arrow{display:none}

/* ===== Use Cases ===== */
.usecases{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.usecase{
  position:relative;padding:32px 26px;border-radius:18px;
  background:linear-gradient(160deg,rgba(20,36,72,.6),rgba(8,16,38,.6));
  border:1px solid var(--panel-brd);overflow:hidden;transition:.3s;
}
.usecase:hover{transform:translateY(-6px);border-color:var(--blue);box-shadow:0 22px 50px rgba(0,0,0,.45)}
.usecase__tag{display:inline-block;font-size:10.5px;letter-spacing:2px;padding:4px 10px;border-radius:999px;background:rgba(47,123,255,.18);color:var(--cyan);margin-bottom:14px}
.usecase h3{font-size:19px;margin-bottom:10px}
.usecase p{color:var(--text-dim);font-size:14px;margin-bottom:14px}
.usecase ul{list-style:none;padding:0;margin:0}
.usecase li{padding-left:20px;position:relative;color:var(--text-dim);font-size:13.5px;margin-bottom:6px}
.usecase li::before{content:"→";position:absolute;left:0;color:var(--cyan)}
.usecase__deco{position:absolute;right:-40px;top:-40px;width:140px;height:140px;border-radius:50%;background:radial-gradient(circle,rgba(47,123,255,.35),transparent 70%);pointer-events:none}

/* ===== Global Coverage Map ===== */
.coverage{display:grid;grid-template-columns:1fr 320px;gap:24px;align-items:start}
.coverage__map{
  position:relative;min-height:440px;
  background:radial-gradient(ellipse at 50% 40%,rgba(47,123,255,.10),transparent 70%);
  border:1px solid var(--panel-brd);border-radius:20px;padding:12px;
  overflow:hidden;
}
.coverage__map svg{display:block;width:100%;height:auto}
.map-loading,.map-fallback{
  position:absolute;inset:0;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:10px;padding:32px;text-align:center;
}
.map-loading{color:var(--text-dim);font-size:14px}
.map-fallback b{font-size:18px}
.map-fallback p{color:var(--text-dim);font-size:14px;max-width:560px}
.map-fallback__tags{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-top:10px;max-height:200px;overflow:auto}
.map-fallback__tags span{
  font-size:11.5px;padding:3px 9px;border-radius:999px;
  background:rgba(47,123,255,.14);border:1px solid var(--panel-brd);color:var(--text-dim);
}

/* map elements */
.country{transition:fill .2s}
.country--on{filter:drop-shadow(0 0 6px rgba(47,123,255,.5))}
.arc-path{
  fill:none;stroke:url(#arcGrad);stroke-width:1;
  stroke-dasharray:5 7;animation:dashFlow 1.6s linear infinite;opacity:.75;
}
@keyframes dashFlow{to{stroke-dashoffset:-24}}
.mark-dot{fill:#38d0ff;transition:r .2s}
.mark-pulse{
  fill:none;stroke:#38d0ff;stroke-width:1.2;opacity:.8;
  transform-box:fill-box;transform-origin:center;
  animation:mapPulse 2.6s ease-out infinite;
}
@keyframes mapPulse{
  0%{transform:scale(.5);opacity:.9}
  100%{transform:scale(3.4);opacity:0}
}
.hq-pulse{
  fill:rgba(94,242,255,.25);stroke:#5ef2ff;stroke-width:1;
  transform-box:fill-box;transform-origin:center;
  animation:mapPulse 2.2s ease-out infinite;
}
.map-label{fill:var(--text-dim);font-size:11px;font-family:"Inter",sans-serif;letter-spacing:.5px}
.map-label--hq{fill:var(--cyan);font-weight:700;font-size:11.5px}
.mark{cursor:pointer}

.map-tip{
  position:absolute;transform:translate(-50%,-160%);
  background:rgba(5,11,26,.95);border:1px solid var(--blue);
  color:var(--text);font-size:12.5px;font-weight:600;
  padding:5px 12px;border-radius:8px;pointer-events:none;
  opacity:0;transition:opacity .18s;white-space:nowrap;z-index:5;
  box-shadow:0 8px 20px rgba(0,0,0,.5);
}
.map-tip.is-on{opacity:1}

/* side panel */
.coverage__side{display:flex;flex-direction:column;gap:14px}
.side-card{
  background:var(--panel);border:1px solid var(--panel-brd);
  border-radius:16px;padding:20px;
}
.side-card h4{font-size:13px;color:var(--cyan);letter-spacing:2px;text-transform:uppercase;margin-bottom:12px}
.side-hq{font-size:16px;font-weight:600}
.side-coord{color:var(--text-dim);font-size:13px;margin-top:4px}
.region-list{list-style:none;padding:0;margin:0}
.region-list li{
  display:flex;justify-content:space-between;align-items:center;
  padding:9px 0;border-bottom:1px solid rgba(120,170,255,.08);font-size:14px;
}
.region-list li:last-child{border-bottom:0}
.region-list span{color:var(--text-dim)}
.region-list b{
  font-size:17px;background:var(--grad);-webkit-background-clip:text;
  background-clip:text;color:transparent;font-family:"Orbitron",sans-serif;
}
.side-card--hl{
  background:linear-gradient(135deg,rgba(47,123,255,.16),rgba(56,208,255,.06));
  border-color:var(--blue);text-align:center;padding:26px 20px;
}
.side-big{
  display:block;font-size:44px;font-weight:800;font-family:"Orbitron",sans-serif;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  line-height:1.1;
}
.side-card--hl span{display:block;margin-top:6px;font-size:13px;color:var(--text-dim)}

/* ===== Comparison Table ===== */
.compare{
  width:100%;border-collapse:separate;border-spacing:0;
  background:var(--panel);border:1px solid var(--panel-brd);border-radius:18px;overflow:hidden;
}
.compare th,.compare td{padding:16px 22px;text-align:left;font-size:14px;border-bottom:1px solid var(--panel-brd)}
.compare tr:last-child th,.compare tr:last-child td{border-bottom:0}
.compare th{color:var(--text-dim);font-weight:500;width:28%;background:rgba(255,255,255,.02)}
.compare td{color:var(--text)}
.compare td.bad{color:#ff8a8a}
.compare td.good{color:var(--cyan);font-weight:600}
.compare tr.section-row td{background:rgba(47,123,255,.08);color:var(--cyan);font-weight:700;letter-spacing:1px;font-size:12px;text-transform:uppercase;padding:10px 22px}

/* ===== FAQ ===== */
.faq{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.faq details{
  background:var(--panel);border:1px solid var(--panel-brd);border-radius:14px;
  padding:18px 22px;transition:.25s;
}
.faq details[open]{border-color:var(--blue);background:rgba(47,123,255,.06)}
.faq summary{cursor:pointer;font-weight:600;font-size:15px;list-style:none;display:flex;justify-content:space-between;align-items:center;color:var(--text)}
.faq summary::after{content:"+";color:var(--cyan);font-size:22px;font-weight:300;transition:.3s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq summary::-webkit-details-marker{display:none}
.faq p{margin-top:12px;color:var(--text-dim);font-size:13.5px}

/* ===== 系统 ===== */
.system{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.system__left p{color:var(--text-dim);margin-bottom:22px;font-size:16px}
.check-list{list-style:none;display:grid;gap:14px}
.check-list li{position:relative;padding-left:32px;color:var(--text);font-size:15px}
.check-list li::before{
  content:"✓";position:absolute;left:0;top:1px;width:22px;height:22px;border-radius:50%;
  background:var(--grad);color:#04102a;font-size:13px;font-weight:800;display:grid;place-items:center;
}
.spec-card{background:linear-gradient(160deg,rgba(20,36,72,.85),rgba(8,16,38,.85));border:1px solid var(--panel-brd);border-radius:20px;padding:12px 26px;box-shadow:0 20px 50px rgba(0,0,0,.45)}
.spec-card__row{display:flex;justify-content:space-between;align-items:center;padding:16px 0;border-bottom:1px solid rgba(120,170,255,.08)}
.spec-card__row:last-child{border-bottom:0}
.spec-card__row span{color:var(--text-dim);font-size:14px}
.spec-card__row b{font-size:16px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* spec icon cards (visual metrics) */
.spec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:8px}
.spec-card--icon{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:28px 18px;gap:6px;transition:.25s}
.spec-card--icon:hover{transform:translateY(-4px);border-color:var(--blue);box-shadow:0 18px 40px rgba(0,0,0,.45)}
.spec-card__icon{
  width:54px;height:54px;border-radius:50%;
  display:grid;place-items:center;font-size:26px;
  background:linear-gradient(160deg,rgba(47,123,255,.18),rgba(56,208,255,.10));
  border:1px solid rgba(120,170,255,.25);
  margin-bottom:6px;
}
.spec-card--icon b{
  font-family:'Orbitron',sans-serif;font-weight:800;font-size:32px;line-height:1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  display:inline-flex;align-items:baseline;gap:2px;
}
.spec-card--icon b small{font-size:14px;font-weight:600;opacity:.85}
.spec-card--icon span{color:var(--text-dim);font-size:13px;letter-spacing:.04em}
@media (max-width:900px){.spec-grid{grid-template-columns:repeat(2,1fr)}}

/* ===== 时间轴 ===== */
.timeline{max-width:820px;margin:0 auto;position:relative;padding-left:32px}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--blue),var(--cyan))}
.tl-item{position:relative;padding:0 0 30px 26px}
.tl-item::before{content:"";position:absolute;left:-3px;top:4px;width:16px;height:16px;border-radius:50%;background:var(--grad);box-shadow:0 0 0 4px rgba(47,123,255,.15)}
.tl-year{font-size:20px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.tl-item p{color:var(--text-dim);margin-top:4px}

/* ===== 资质 ===== */
.cert{background:var(--panel);border:1px solid var(--panel-brd);border-radius:var(--radius);padding:24px;text-align:center;transition:.25s}
.cert:hover{transform:translateY(-5px);border-color:var(--cyan);box-shadow:0 16px 36px rgba(0,0,0,.4)}
.cert b{display:block;font-size:16px;margin-bottom:8px;color:var(--text)}
.cert p{font-size:13px;color:var(--text-dim)}

/* ===== 文化 ===== */
.culture{background:var(--panel);border:1px solid var(--panel-brd);border-radius:var(--radius);padding:24px;transition:.25s}
.culture:hover{transform:translateY(-5px);border-color:var(--blue)}
.culture h4{font-size:16px;margin-bottom:8px;color:var(--cyan)}
.culture p{font-size:14px;color:var(--text-dim)}
.culture__values{margin-top:24px}
.values{display:grid;grid-template-columns:1fr 2fr;gap:22px;background:var(--panel);border:1px solid var(--panel-brd);border-radius:var(--radius);padding:30px}
.value b{display:block;color:var(--cyan);font-size:14px;margin-bottom:6px;letter-spacing:1px}
.value span{font-size:18px;font-weight:600}

/* ===== CTA ===== */
.cta{padding:80px 0}
.cta__inner{text-align:center;background:linear-gradient(135deg,rgba(47,123,255,.16),rgba(56,208,255,.10));border:1px solid var(--panel-brd);border-radius:24px;padding:56px 30px}
.cta__inner h2{font-size:clamp(22px,3vw,32px);font-weight:800;margin-bottom:14px}
.cta__inner p{color:var(--text-dim);margin-bottom:30px}
.cta__actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.cta__meta{
  display:flex;flex-wrap:wrap;justify-content:center;gap:24px;
  margin-top:32px;font-size:13px;color:var(--text-dim);
}

/* ===== 页脚 ===== */
.footer{border-top:1px solid var(--panel-brd);padding:36px 0;background:rgba(5,11,26,.6)}
.footer__inner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.footer__brand{display:flex;align-items:center;gap:14px}
.footer__brand b{display:block;font-size:16px}
.footer__brand small{color:var(--text-dim);font-size:13px}
.footer__copy{color:var(--text-dim);font-size:13px}

/* ===== 动画 ===== */
/* 渐进增强：默认可见，JS 就绪后才启用入场动画 */
.reveal{opacity:1;transform:none;transition:opacity .7s ease,transform .7s ease}
.reveal.js-anim{opacity:0;transform:translateY(28px)}
.reveal.js-anim.in{opacity:1;transform:none}

/* 数字 counting 完成时弹一下 */
.is-popped{animation:numPop .55s cubic-bezier(.2,.7,.3,1.4)}
@keyframes numPop{
  0%{transform:scale(1)}
  40%{transform:scale(1.22)}
  70%{transform:scale(.96)}
  100%{transform:scale(1)}
}

/* 卡片/模块悬停时浮起 + 描边发光 */
.adv,.module,.usecase,.mini-card,.side-card{transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease}
.adv:hover,.module:hover,.usecase:hover,.mini-card:hover,.side-card:hover{
  transform:translateY(-6px);
  border-color:rgba(94,242,255,.45);
  box-shadow:0 18px 40px rgba(47,123,255,.18),0 0 0 1px rgba(94,242,255,.18);
}

/* ===== 响应式 ===== */
@media(max-width:960px){
  .hero__inner,.about,.system{grid-template-columns:1fr}
  .hero__visual{order:-1}
  .grid--products,.grid--adv,.grid--modules,.grid--certs,.grid--culture{grid-template-columns:repeat(2,1fr)}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .coverage{grid-template-columns:1fr}
  .coverage__side{display:grid;grid-template-columns:repeat(3,1fr)}
  .trustband__logos{grid-template-columns:repeat(3,1fr)}
  .bignum{grid-template-columns:repeat(3,1fr)}
  .bignum__cell:nth-child(3){border-right:0}
  .process-grid,.usecases{grid-template-columns:1fr}
  .step__arrow{display:none}
  .faq{grid-template-columns:1fr}
  .nav__links{
    position:fixed;top:72px;left:0;right:0;flex-direction:column;gap:0;
    background:rgba(5,11,26,.97);backdrop-filter:blur(12px);
    border-bottom:1px solid var(--panel-brd);
    max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 24px;
  }
  .nav__links.open{max-height:520px;padding:16px 24px 24px}
  .nav__links a{padding:14px 0;width:100%;border-bottom:1px solid rgba(120,170,255,.06)}
  .nav__cta{border-bottom:0;margin-top:10px;text-align:center}
  .nav__toggle{display:flex}
}
@media(max-width:560px){
  .hero__stats{grid-template-columns:repeat(2,1fr)}
  .grid--products,.grid--adv,.grid--modules,.grid--certs,.grid--culture,.about__cards,.values,.metrics{grid-template-columns:1fr}
  .coverage__side{grid-template-columns:1fr}
  .bignum{grid-template-columns:repeat(2,1fr)}
  .bignum__cell{border-right:0;border-bottom:1px solid var(--panel-brd)}
  .trustband__logos{grid-template-columns:repeat(2,1fr)}
  .hero{padding-top:120px}
}