/* ============================================================
   智脑 · AI全域数智一体化平台 — 门户网站样式
   主题：深色高科技 · 蓝青渐变 · 玻璃拟态 · 响应式
   ============================================================ */

:root{
  --bg:#050b1a;
  --bg-2:#081226;
  --bg-3:#0b1a36;
  --panel:rgba(13,28,58,.55);
  --panel-solid:#0c1d3f;
  --line:rgba(0,212,255,.16);
  --line-2:rgba(47,107,255,.28);
  --cyan:#00d4ff;
  --blue:#2f6bff;
  --violet:#7c5cff;
  --green:#2fe6a8;
  --amber:#ffc455;
  --pink:#ff5c8a;
  --text:#e8f2ff;
  --text-dim:#9db4d8;
  --text-mute:#6f87ad;
  --grad:linear-gradient(120deg,#00d4ff 0%,#2f6bff 55%,#7c5cff 100%);
  --radius:16px;
  --shadow:0 18px 60px rgba(0,0,0,.45);
  --font:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --maxw:1200px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
ul{list-style:none}
img{max-width:100%;display:block}
button{font-family:inherit}
::selection{background:rgba(0,212,255,.28)}

/* 滚动条 */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg-2)}
::-webkit-scrollbar-thumb{background:linear-gradient(180deg,#14508a,#0a2a55);border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:var(--blue)}

.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ================= 顶部导航 ================= */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(5,11,26,.62);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(0,212,255,.1);
  transition:background .35s ease, box-shadow .35s ease;
}
.site-header.scrolled{
  background:rgba(4,9,20,.9);
  box-shadow:0 10px 40px rgba(0,0,0,.5);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:74px}

.brand{display:flex;align-items:center;gap:12px}
.brand-mark{display:grid;place-items:center;filter:drop-shadow(0 0 10px rgba(0,212,255,.5))}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:20px;letter-spacing:2px;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.brand-text i{font-style:normal;font-size:11px;color:var(--text-mute);letter-spacing:1px}

.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{
  position:relative;padding:9px 14px;font-size:14.5px;color:var(--text-dim);
  border-radius:8px;transition:color .25s,background .25s;
}
.main-nav a:hover{color:var(--text);background:rgba(0,212,255,.08)}
.main-nav a.active{color:var(--cyan)}
.main-nav a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--grad);border-radius:2px;box-shadow:0 0 10px rgba(0,212,255,.8);
}
.main-nav .nav-cta{
  margin-left:10px;padding:9px 20px;color:#fff;font-weight:600;
  background:var(--grad);border-radius:30px;
  box-shadow:0 6px 24px rgba(47,107,255,.45);
  transition:transform .25s, box-shadow .25s;
}
.main-nav .nav-cta:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(47,107,255,.6);color:#fff}

.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;border:1px solid var(--line);border-radius:10px;
  background:rgba(0,212,255,.05);cursor:pointer;
}
.nav-toggle span{display:block;width:20px;height:2px;margin:0 auto;background:var(--cyan);border-radius:2px;transition:transform .3s,opacity .3s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ================= Hero ================= */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  padding:130px 0 80px;overflow:hidden;
  background:
    radial-gradient(900px 500px at 80% -10%,rgba(47,107,255,.22),transparent 60%),
    radial-gradient(700px 500px at 8% 110%,rgba(0,212,255,.14),transparent 60%),
    var(--bg);
}
.hero-grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(0,212,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,212,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 90% 75% at 50% 40%,#000 30%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 90% 75% at 50% 40%,#000 30%,transparent 75%);
  pointer-events:none;
}
#particleCanvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}

.hero-inner{
  position:relative;z-index:2;display:grid;grid-template-columns:1.08fr .92fr;
  gap:60px;align-items:center;width:100%;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;padding:7px 16px;margin-bottom:22px;
  font-size:13px;color:var(--cyan);letter-spacing:1px;
  border:1px solid var(--line);border-radius:30px;background:rgba(0,212,255,.06);
}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.8)}}

.hero h1{
  font-size:clamp(34px,4.6vw,58px);line-height:1.18;font-weight:800;letter-spacing:1px;
  margin-bottom:18px;
}
.hero h1 em{
  font-style:normal;background:var(--grad);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  filter:drop-shadow(0 0 22px rgba(0,212,255,.35));
}
.hero-typed-wrap{font-family:var(--mono);font-size:clamp(15px,1.5vw,19px);color:var(--green);min-height:30px;margin-bottom:14px}
.caret{display:inline-block;width:9px;height:1.25em;background:var(--green);vertical-align:text-bottom;margin-left:2px;animation:blink .8s step-end infinite}
@keyframes blink{50%{opacity:0}}
.hero-sub{font-size:15.5px;color:var(--text-dim);max-width:560px;margin-bottom:30px}

.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:38px}
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:30px;
  font-size:15px;font-weight:600;cursor:pointer;border:none;transition:transform .25s,box-shadow .25s,background .25s;
}
.btn svg{transition:transform .25s}
.btn:hover svg{transform:translateX(3px)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 30px rgba(47,107,255,.5)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 14px 40px rgba(47,107,255,.65)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--line-2)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-3px);background:rgba(0,212,255,.05)}
.btn-sm{padding:10px 22px;font-size:14px}

.hero-mini-stats{display:flex;gap:34px;flex-wrap:wrap}
.hero-mini-stats li{display:flex;flex-direction:column}
.hero-mini-stats b{font-size:26px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-mini-stats span{font-size:12.5px;color:var(--text-mute)}

/* 终端视觉 */
.hero-visual{position:relative;display:flex;justify-content:center}
.hero-visual::before{
  content:"";position:absolute;inset:-8% -6%;
  background:radial-gradient(circle,rgba(0,212,255,.16),transparent 62%);
  filter:blur(20px);
}
.term{
  position:relative;width:100%;max-width:520px;border-radius:14px;overflow:hidden;
  border:1px solid var(--line);background:linear-gradient(180deg,rgba(12,29,63,.9),rgba(6,14,32,.95));
  box-shadow:0 30px 90px rgba(0,0,0,.55),0 0 60px rgba(0,212,255,.1);
  transform:perspective(1200px) rotateY(-4deg) rotateX(2deg);
  animation:float 6s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:perspective(1200px) rotateY(-4deg) rotateX(2deg) translateY(0)}50%{transform:perspective(1200px) rotateY(-4deg) rotateX(2deg) translateY(-14px)}}
.term-bar{display:flex;align-items:center;gap:7px;padding:11px 14px;border-bottom:1px solid var(--line);background:rgba(0,0,0,.3)}
.term-bar .dot{width:10px;height:10px;border-radius:50%}
.term-bar .r{background:#ff5f57}.term-bar .y{background:#febc2e}.term-bar .g{background:#28c840}
.term-bar i{flex:1;text-align:center;font-style:normal;font-size:12px;color:var(--text-mute);font-family:var(--mono);overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.term-body{padding:22px 22px 24px;font-family:var(--mono);font-size:13.5px}
.term-body .q{color:var(--text);margin-bottom:14px}
.term-body .q::before{content:"";display:inline-block;width:34px;height:34px;border-radius:8px;margin-right:10px;vertical-align:middle;background:linear-gradient(135deg,#00d4ff,#2f6bff);}
.term-body .thinking{display:flex;align-items:center;gap:8px;color:var(--text-mute);font-size:12.5px;margin-bottom:14px}
.term-body .thinking span{width:5px;height:5px;border-radius:50%;background:var(--cyan);animation:dot 1.2s infinite}
.term-body .thinking span:nth-child(2){animation-delay:.2s}
.term-body .thinking span:nth-child(3){animation-delay:.4s}
@keyframes dot{0%,100%{opacity:.2}50%{opacity:1}}
.answer{border:1px solid var(--line);border-radius:12px;padding:14px;background:rgba(0,212,255,.04)}
.answer>b{display:block;font-size:12px;color:var(--cyan);letter-spacing:1px;margin-bottom:12px}
.answer-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:16px}
.a-card{text-align:center;padding:10px 6px;border-radius:10px;background:rgba(8,18,38,.8);border:1px solid var(--line)}
.a-card i{display:block;font-style:normal;font-size:10.5px;color:var(--text-mute);margin-bottom:4px}
.a-card b{display:block;font-size:18px;color:var(--green)}
.a-card span{font-size:11px;color:var(--text-mute)}
.bars{display:flex;align-items:flex-end;gap:6px;height:56px}
.bars span{flex:1;height:var(--h);border-radius:4px 4px 0 0;background:linear-gradient(180deg,var(--cyan),rgba(47,107,255,.35));animation:grow 1.2s ease both;transform-origin:bottom}
@keyframes grow{from{transform:scaleY(0)}to{transform:scaleY(1)}}

.hero-scroll{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);z-index:2;
  width:26px;height:42px;border:2px solid rgba(0,212,255,.4);border-radius:14px;
}
.hero-scroll span{position:absolute;left:50%;top:8px;width:4px;height:8px;margin-left:-2px;border-radius:2px;background:var(--cyan);animation:scrollDown 1.8s infinite}
@keyframes scrollDown{0%{opacity:0;transform:translateY(0)}30%{opacity:1}100%{opacity:0;transform:translateY(16px)}}

/* ================= 数据统计 ================= */
.stats{
  position:relative;background:linear-gradient(180deg,var(--bg-2),var(--bg));
  border-top:1px solid rgba(0,212,255,.08);border-bottom:1px solid rgba(0,212,255,.08);
  padding:54px 0;
}
.stats-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:24px}
.stat{text-align:center;position:relative}
.stat:not(:last-child)::after{
  content:"";position:absolute;right:-12px;top:20%;height:60%;width:1px;background:linear-gradient(180deg,transparent,rgba(0,212,255,.3),transparent);
}
.stat b{display:block;font-size:clamp(28px,3vw,42px);font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat span{font-size:13.5px;color:var(--text-dim)}

/* ================= 通用 Section ================= */
.section{padding:96px 0;position:relative}
.sec-head{text-align:center;max-width:820px;margin:0 auto 56px}
.sec-tag{
  display:inline-block;padding:5px 14px;margin-bottom:16px;font-size:12px;letter-spacing:3px;
  color:var(--cyan);border:1px solid var(--line);border-radius:30px;background:rgba(0,212,255,.05);
}
.sec-head h2{font-size:clamp(26px,3.2vw,38px);font-weight:800;letter-spacing:1px;margin-bottom:16px}
.sec-head p{color:var(--text-dim);font-size:15.5px}
.sec-head.light h2{color:#fff}
.sec-head.light p{color:var(--text-dim)}

/* ================= 智脑平台四卡 ================= */
.four-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.cap-card{
  position:relative;padding:30px 24px;border-radius:var(--radius);overflow:hidden;
  background:var(--panel);border:1px solid var(--line);backdrop-filter:blur(10px);
  transition:transform .35s,border-color .35s,box-shadow .35s;
}
.cap-card::before{
  content:"";position:absolute;top:-70px;right:-70px;width:160px;height:160px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,212,255,.18),transparent 70%);
  opacity:0;transition:opacity .4s;
}
.cap-card:hover{transform:translateY(-8px);border-color:rgba(0,212,255,.4);box-shadow:0 24px 60px rgba(0,0,0,.5)}
.cap-card:hover::before{opacity:1}
.cap-card .cap-no{position:absolute;top:18px;right:20px;font-size:13px;font-family:var(--mono);color:var(--text-mute)}
.cap-icon{
  width:74px;height:74px;display:grid;place-items:center;border-radius:18px;margin-bottom:20px;
  background:rgba(0,212,255,.08);border:1px solid var(--line);
}
.cap-q .cap-icon{color:var(--cyan)}
.cap-z .cap-icon{color:var(--blue)}
.cap-c .cap-icon{color:var(--amber)}
.cap-x .cap-icon{color:var(--green)}
.cap-card h3{font-size:20px;margin-bottom:12px;font-weight:700}
.cap-card>p{font-size:13.8px;color:var(--text-dim);margin-bottom:16px}
.cap-card ul{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.cap-card ul li{
  position:relative;padding-left:16px;font-size:13px;color:var(--text-dim);
}
.cap-card ul li::before{content:"▹";position:absolute;left:0;color:var(--cyan)}
.cap-verdict{
  font-size:12.5px;color:var(--cyan);padding:9px 12px;border-radius:8px;
  background:rgba(0,212,255,.06);border:1px dashed var(--line);font-family:var(--mono);
}

/* ================= 平台架构 ================= */
.arch-section{
  background:
    radial-gradient(800px 400px at 50% 0%,rgba(47,107,255,.16),transparent 65%),var(--bg-2);
}
.arch{display:flex;flex-direction:column;gap:14px;max-width:1060px;margin:0 auto 28px}
.arch-row{
  border:1px solid var(--line);border-radius:14px;padding:20px 22px;
  background:rgba(10,22,46,.55);position:relative;overflow:hidden;
}
.arch-row::after{
  content:"";position:absolute;left:0;top:0;height:100%;width:4px;
  background:var(--grad);border-radius:4px;
}
.arch-title{font-size:13px;letter-spacing:2px;color:var(--cyan);margin-bottom:12px;font-family:var(--mono)}
.arch-chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  font-size:13px;color:var(--text-dim);padding:8px 14px;border-radius:9px;
  background:rgba(0,212,255,.05);border:1px solid rgba(0,212,255,.12);
}
.chip b{color:var(--text);margin-right:6px}
.arch-row.user .chip b{color:var(--green)}
.arch-row.manage .chip b{color:var(--amber)}
.arch-note{
  max-width:1060px;margin:0 auto;display:flex;gap:10px;align-items:flex-start;
  padding:16px 20px;border-radius:12px;font-size:13.5px;color:var(--text-dim);
  background:rgba(0,212,255,.05);border:1px dashed var(--line);
}
.arch-note svg{flex-shrink:0;color:var(--cyan);margin-top:3px}

/* ================= 方案价值 ================= */
.value-section{
  background:
    radial-gradient(700px 400px at 100% 20%,rgba(124,92,255,.14),transparent 60%),
    radial-gradient(700px 400px at 0% 80%,rgba(0,212,255,.12),transparent 60%);
}
.value-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.value-card{
  text-align:center;padding:36px 22px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);transition:transform .35s,border-color .35s;
}
.value-card:hover{transform:translateY(-6px);border-color:var(--line-2)}
.value-num{font-size:52px;font-weight:800;line-height:1;margin-bottom:16px}
.value-card.v1 .value-num{color:var(--cyan);text-shadow:0 0 30px rgba(0,212,255,.5)}
.value-card.v2 .value-num{color:var(--green);text-shadow:0 0 30px rgba(47,230,168,.5)}
.value-card.v3 .value-num{color:var(--amber);text-shadow:0 0 30px rgba(255,196,85,.5)}
.value-card.v4 .value-num{color:var(--violet);text-shadow:0 0 30px rgba(124,92,255,.5)}
.value-num small{font-size:22px;margin-left:2px}
.value-card h3{font-size:19px;margin-bottom:10px}
.value-card p{font-size:13.5px;color:var(--text-dim)}

/* ================= 产品中心 ================= */
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-bottom:56px}
.product-card{
  position:relative;padding:28px 22px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);transition:transform .35s,border-color .35s,box-shadow .35s;
}
.product-card:hover{transform:translateY(-8px);border-color:var(--line-2);box-shadow:0 24px 60px rgba(0,0,0,.5)}
.product-head{margin-bottom:14px}
.product-ico{width:64px;height:64px;display:grid;place-items:center;border-radius:16px;margin-bottom:14px;background:rgba(0,212,255,.07);border:1px solid var(--line)}
.p-net .product-ico{color:var(--cyan)}
.p-wan .product-ico{color:var(--blue)}
.p-iot .product-ico{color:var(--green)}
.p-ai .product-ico{color:var(--violet)}
.product-head h3{font-size:19px;margin-bottom:2px}
.product-tag{font-size:12px;color:var(--text-mute);letter-spacing:1px}
.product-card>p{font-size:13.5px;color:var(--text-dim);margin-bottom:14px;min-height:78px}
.product-card ul{display:flex;flex-direction:column;gap:7px}
.product-card ul li{position:relative;padding-left:16px;font-size:13px;color:var(--text-dim)}
.product-card ul li::before{content:"✓";position:absolute;left:0;color:var(--green)}
.product-card.featured{
  border-color:rgba(124,92,255,.45);
  background:linear-gradient(160deg,rgba(124,92,255,.12),rgba(13,28,58,.6));
}
.featured-badge{
  position:absolute;top:14px;right:14px;padding:4px 10px;font-size:11px;letter-spacing:1px;
  color:#fff;background:var(--grad);border-radius:20px;box-shadow:0 4px 16px rgba(47,107,255,.5);
}

.policy{
  display:flex;gap:24px;align-items:center;max-width:1060px;margin:0 auto;padding:32px 34px;
  border-radius:var(--radius);background:var(--panel);border:1px solid var(--line-2);
}
.policy-icon{
  flex-shrink:0;width:110px;height:110px;display:grid;place-items:center;border-radius:22px;
  font-size:30px;font-weight:800;color:#fff;background:var(--grad);
  box-shadow:0 14px 40px rgba(47,107,255,.5);
  transform:rotate(-4deg);
}
.policy-body h3{font-size:19px;margin-bottom:12px}
.policy-body p{font-size:14px;color:var(--text-dim);margin-bottom:8px}
.policy-body p b{color:var(--cyan)}

/* ================= 成功案例 ================= */
.cases-section{
  background:
    radial-gradient(800px 500px at 10% 0%,rgba(0,212,255,.12),transparent 60%),var(--bg-2);
}
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;max-width:1060px;margin:0 auto 64px}
.case-card{padding:30px;border-radius:var(--radius);border:1px solid var(--line);background:var(--panel)}
.case-card:hover{border-color:var(--line-2)}
.case-type{display:inline-block;padding:4px 12px;border-radius:20px;font-size:12px;letter-spacing:1px;margin-bottom:14px}
.case-gov .case-type{color:var(--cyan);background:rgba(0,212,255,.1);border:1px solid var(--line)}
.case-mfg .case-type{color:var(--amber);background:rgba(255,196,85,.1);border:1px solid rgba(255,196,85,.25)}
.case-top h3{font-size:21px;margin-bottom:10px}
.case-desc{font-size:14px;color:var(--text-dim);margin-bottom:20px}
.case-data{display:grid;grid-template-columns:1fr 1fr;gap:12px 18px;margin-bottom:20px}
.case-data dt{font-size:12px;color:var(--text-mute);letter-spacing:1px;margin-bottom:3px}
.case-data dd{font-size:14px;color:var(--text)}
.case-versus{
  display:flex;flex-direction:column;gap:8px;padding:14px 16px;border-radius:10px;font-size:13px;
  background:rgba(0,212,255,.04);border:1px dashed var(--line);
}
.vs-old{color:var(--text-mute)}
.vs-arrow{color:var(--cyan);font-family:var(--mono)}
.vs-new{color:var(--green)}

.clients{text-align:center;max-width:1060px;margin:0 auto}
.clients h3{font-size:16px;color:var(--text-dim);letter-spacing:1px;margin-bottom:22px}
.client-logos{display:flex;flex-wrap:wrap;justify-content:center;gap:14px}
.logo-item{
  padding:14px 26px;border-radius:12px;font-size:14.5px;font-weight:600;color:var(--text-dim);
  border:1px solid var(--line);background:rgba(10,22,46,.5);transition:color .3s,border-color .3s,transform .3s;
}
.logo-item:hover{color:var(--cyan);border-color:var(--cyan);transform:translateY(-3px)}

/* ================= 关于我们 ================= */
.about-wrap{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.about-visual{position:relative;min-height:340px;display:grid;place-items:center;overflow:hidden}
.orb{
  position:absolute;width:300px;height:300px;border-radius:50%;
  background:radial-gradient(circle at 35% 35%,rgba(0,212,255,.25),rgba(47,107,255,.12) 50%,transparent 70%);
  border:1px solid rgba(0,212,255,.25);animation:spin 22s linear infinite;
}
.orb::before{content:"";position:absolute;inset:-42px;border-radius:50%;border:1px dashed rgba(0,212,255,.2);animation:spin 30s linear infinite reverse}
@keyframes spin{to{transform:rotate(360deg)}}
.code-snippet{
  position:relative;z-index:2;width:min(420px,90%);border-radius:14px;overflow:hidden;
  border:1px solid var(--line);background:rgba(6,14,32,.92);box-shadow:var(--shadow);
  font-family:var(--mono);font-size:13.5px;
}
.code-bar{display:flex;gap:6px;padding:11px 14px;border-bottom:1px solid var(--line);background:rgba(0,0,0,.3)}
.code-bar i{width:10px;height:10px;border-radius:50%}
.code-bar .g{background:#28c840}.code-bar .y{background:#febc2e}.code-bar .r{background:#ff5f57}
.code-snippet pre{padding:18px;overflow-x:auto;color:var(--text)}
.code-snippet .cm{color:var(--text-mute)}
.code-snippet .kw{color:var(--violet)}
.code-snippet .fn{color:var(--cyan)}
.code-snippet .pk{color:var(--amber)}
.code-snippet .str{color:var(--green)}
.about-body .sec-tag{margin-bottom:14px}
.about-body h2{font-size:clamp(26px,3vw,36px);margin-bottom:18px}
.about-lead{font-size:16.5px;color:var(--text);margin-bottom:12px;font-weight:600}
.about-body p{color:var(--text-dim);font-size:15px;margin-bottom:14px}
.about-points{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}
.about-points li{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text)}
.about-points i{color:var(--green);font-style:normal}

/* ================= 招聘 ================= */
.jobs-section{background:linear-gradient(180deg,var(--bg),var(--bg-2))}
.jobs-wrap{max-width:860px;margin:0 auto}
.jobs-head{text-align:center;margin-bottom:40px}
.jobs-head h2{font-size:clamp(26px,3vw,36px);margin-bottom:12px}
.jobs-head p{color:var(--text-dim)}
.job-card{
  padding:36px;border-radius:var(--radius);border:1px solid var(--line-2);
  background:var(--panel);position:relative;overflow:hidden;
}
.job-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad)}
.job-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.job-title h3{font-size:22px}
.job-place{padding:4px 12px;border-radius:20px;font-size:12px;color:var(--cyan);border:1px solid var(--line)}
.job-desc{color:var(--text-dim);margin-bottom:20px;font-size:14.5px}
.job-req h4{font-size:15px;color:var(--cyan);margin-bottom:12px;letter-spacing:1px}
.job-req ul{display:flex;flex-direction:column;gap:9px;margin-bottom:24px}
.job-req li{position:relative;padding-left:18px;color:var(--text-dim);font-size:14px}
.job-req li::before{content:"◆";position:absolute;left:0;color:var(--cyan);font-size:10px;top:4px}

/* ================= 联系我们 ================= */
.contact-section{
  background:
    radial-gradient(800px 400px at 50% 0%,rgba(47,107,255,.16),transparent 65%),var(--bg-2);
}
.contact-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:40px;max-width:1060px;margin:0 auto}
.contact-info{display:flex;flex-direction:column;gap:20px}
.c-item{display:flex;gap:16px;align-items:flex-start;padding:20px;border-radius:14px;border:1px solid var(--line);background:var(--panel)}
.c-ico{
  flex-shrink:0;width:46px;height:46px;display:grid;place-items:center;border-radius:12px;
  color:var(--cyan);background:rgba(0,212,255,.08);border:1px solid var(--line);
}
.c-item b{display:block;font-size:15px;margin-bottom:3px}
.c-item p{font-size:13.5px;color:var(--text-dim)}
.contact-form{
  padding:32px;border-radius:var(--radius);border:1px solid var(--line-2);
  background:var(--panel);display:flex;flex-direction:column;gap:16px;
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.contact-form input,.contact-form select,.contact-form textarea{
  width:100%;padding:13px 16px;border-radius:10px;font-size:14px;color:var(--text);
  background:rgba(6,14,32,.7);border:1px solid var(--line);outline:none;
  font-family:inherit;transition:border-color .25s,box-shadow .25s;
}
.contact-form input::placeholder,.contact-form textarea::placeholder{color:var(--text-mute)}
.contact-form select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--cyan) 50%),linear-gradient(135deg,var(--cyan) 50%,transparent 50%);background-position:calc(100% - 22px) 50%,calc(100% - 14px) 50%;background-size:8px 8px;background-repeat:no-repeat;cursor:pointer}
.contact-form select option{background:var(--panel-solid);color:var(--text)}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(0,212,255,.12)}
.contact-form input[aria-invalid="true"],.contact-form textarea[aria-invalid="true"]{border-color:var(--pink)}
.form-msg{min-height:22px;font-size:13px;color:var(--green)}
.form-msg.error{color:var(--pink)}
.contact-form .btn{align-self:flex-start}

/* ================= 页脚 ================= */
.site-footer{border-top:1px solid rgba(0,212,255,.1);background:#04091a;padding:56px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;margin-bottom:40px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:13.5px;color:var(--text-mute);margin-top:14px;max-width:280px}
.footer-col h4{font-size:15px;color:var(--text);margin-bottom:16px;letter-spacing:1px;position:relative;padding-bottom:10px}
.footer-col h4::after{content:"";position:absolute;left:0;bottom:0;width:28px;height:2px;background:var(--grad)}
.footer-col a,.footer-col p{display:block;font-size:13.5px;color:var(--text-mute);margin-bottom:10px;transition:color .25s,padding-left .25s}
.footer-col a:hover{color:var(--cyan);padding-left:6px}
.footer-bottom{border-top:1px solid rgba(0,212,255,.08);padding-top:22px;text-align:center}
.footer-bottom p{font-size:13px;color:var(--text-mute)}

/* 回到顶部 */
.back-top{
  position:fixed;right:26px;bottom:30px;z-index:900;width:46px;height:46px;display:grid;place-items:center;
  border-radius:12px;color:var(--cyan);background:var(--panel-solid);border:1px solid var(--line);
  opacity:0;visibility:hidden;transform:translateY(16px);transition:all .35s;
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{background:var(--grad);color:#fff;border-color:transparent}

/* 滚动进入动画 */
.reveal{opacity:0;transform:translateY(36px);transition:opacity .8s ease,transform .8s ease}
.reveal.in{opacity:1;transform:none}

/* 尊重减少动效偏好 */
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1100px){
  .four-grid{grid-template-columns:repeat(2,1fr)}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .value-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(3,1fr);gap:26px 16px}
  .stat:nth-child(3)::after{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
}

@media (max-width:920px){
  .hero-inner{grid-template-columns:1fr;gap:48px}
  .hero{padding-top:120px}
  .hero-visual{max-width:520px;margin:0 auto;width:100%}
  .about-wrap{grid-template-columns:1fr;gap:40px}
  .contact-grid{grid-template-columns:1fr}
  .case-grid{grid-template-columns:1fr}
}

@media (max-width:820px){
  /* 移动导航 */
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;top:74px;left:0;right:0;flex-direction:column;align-items:stretch;
    background:rgba(4,9,20,.98);backdrop-filter:blur(16px);padding:16px 20px 24px;
    border-bottom:1px solid var(--line);gap:4px;
    transform:translateY(-130%);opacity:0;visibility:hidden;
    transition:transform .35s ease,opacity .35s ease,visibility .35s;
    box-shadow:0 30px 60px rgba(0,0,0,.5);
  }
  .main-nav.open{transform:translateY(0);opacity:1;visibility:visible}
  .main-nav a{padding:13px 14px;font-size:15.5px;border-radius:10px}
  .main-nav a.active::after{left:14px;right:auto;width:22px;bottom:6px}
  .main-nav .nav-cta{margin:10px 0 0;text-align:center}
}

@media (max-width:640px){
  .section{padding:70px 0}
  .container{padding:0 18px}
  .nav-wrap{height:66px}
  .main-nav{top:66px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .stat::after{display:none}
  .four-grid{grid-template-columns:1fr}
  .product-grid{grid-template-columns:1fr}
  .value-grid{grid-template-columns:1fr}
  .case-data{grid-template-columns:1fr}
  .about-points{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .policy{flex-direction:column;text-align:center;padding:26px 20px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .hero-mini-stats{gap:22px}
  .hero-actions .btn{flex:1 1 100%;justify-content:center}
  .term{transform:none}
  .job-card{padding:26px 20px}
  .job-title{flex-direction:column;align-items:flex-start;gap:8px}
  .back-top{right:16px;bottom:20px}
  .policy-icon{width:86px;height:86px;font-size:24px}
}