/* ===================== 基础与变量 ===================== */
:root{
  --bg-0:#070318;
  --bg-1:#0d0726;
  --bg-2:#140a33;
  --purple:#8b5cf6;
  --purple-2:#6d3bf5;
  --blue:#33d6ff;
  --cyan:#2dd4ff;
  --gold:#ffcf5c;
  --gold-2:#ffb627;
  --text:#eef0ff;
  --muted:#a7a3c9;
  --glass:rgba(255,255,255,.06);
  --glass-bd:rgba(255,255,255,.14);
  --maxw:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg-0);
  color:var(--text);
  overflow:hidden;
}
.grad-text{
  background:linear-gradient(100deg,var(--gold) 0%,#fff 45%,var(--cyan) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:0 0 30px rgba(255,207,92,.25);
}
.gold{color:var(--gold)}

/* ===================== 滚动容器 & 分屏 ===================== */
.scroll-container{
  height:100vh;overflow-y:scroll;scroll-snap-type:y mandatory;
  scroll-behavior:smooth;
}
.screen{
  position:relative;height:100vh;width:100%;
  scroll-snap-align:start;scroll-snap-stop:always;
  display:flex;flex-direction:column;justify-content:center;
  padding:80px clamp(40px,7vw,110px);overflow:hidden;
}
.screen-title{
  font-size:clamp(30px,3.6vw,52px);font-weight:900;line-height:1.25;
  letter-spacing:.5px;margin-bottom:34px;
}
.screen-title.center{text-align:center}
.source-note{position:absolute;bottom:34px;right:clamp(40px,7vw,110px);font-size:13px;color:var(--muted)}

/* ===================== 右侧锚点导航 ===================== */
.dot-nav{
  position:fixed;right:24px;top:50%;transform:translateY(-50%);
  z-index:50;display:flex;flex-direction:column;gap:16px;
}
.dot-nav .dot{
  width:11px;height:11px;border-radius:50%;
  background:rgba(255,255,255,.25);border:1px solid rgba(255,255,255,.4);
  position:relative;transition:.35s;
}
.dot-nav .dot:hover{background:var(--gold);transform:scale(1.3)}
.dot-nav .dot.active{
  background:var(--gold);box-shadow:0 0 12px var(--gold);transform:scale(1.35);
}
.dot-nav .dot::after{
  content:attr(data-label);
  position:absolute;right:22px;top:50%;transform:translateY(-50%);
  white-space:nowrap;font-size:12px;color:var(--text);
  background:rgba(13,7,38,.8);padding:3px 9px;border-radius:6px;
  opacity:0;pointer-events:none;transition:.25s;
}
.dot-nav .dot:hover::after{opacity:1}

/* ===================== 通用按钮 ===================== */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:15px 30px;border-radius:40px;font-size:16px;font-weight:700;
  text-decoration:none;cursor:pointer;border:none;transition:.3s;
}
.btn-gold{
  background:linear-gradient(100deg,var(--gold),var(--gold-2));
  color:#1a1030;box-shadow:0 8px 30px rgba(255,182,39,.4);
}
.btn-gold:hover{transform:translateY(-3px);box-shadow:0 12px 40px rgba(255,182,39,.6)}
.btn-ghost{
  background:var(--glass);color:var(--text);border:1px solid var(--glass-bd);
  backdrop-filter:blur(8px);
}
.btn-ghost:hover{background:rgba(255,255,255,.14);transform:translateY(-3px)}

/* ===================== 第1屏 Hero ===================== */
.hero{justify-content:center;align-items:flex-start;text-align:left}
.hero-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.hero-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:1}
.hero-overlay{
  position:absolute;inset:0;z-index:2;
  background:
    radial-gradient(120% 80% at 30% 40%,rgba(13,7,38,.35),transparent 60%),
    linear-gradient(180deg,rgba(7,3,24,.55),rgba(7,3,24,.85));
}
.hero-content{position:relative;z-index:3;max-width:880px}
.hero-title{
  font-size:clamp(40px,6.2vw,84px);font-weight:900;line-height:1.08;
  letter-spacing:1px;margin-bottom:22px;
  text-shadow:0 4px 40px rgba(0,0,0,.6);
}
.hero-sub{
  font-size:clamp(16px,1.6vw,22px);color:#dfe2ff;font-weight:400;
  letter-spacing:2px;margin-bottom:42px;
}
.hero-cta{display:flex;gap:18px;flex-wrap:wrap}
.scroll-hint{
  position:absolute;left:50%;bottom:30px;transform:translateX(-50%);
  z-index:3;color:var(--muted);font-size:14px;letter-spacing:3px;
  text-decoration:none;display:flex;flex-direction:column;align-items:center;gap:6px;
}
.scroll-hint .arrow{font-size:20px;animation:bob 1.6s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(8px)}}

/* ===================== 第2屏 产业 ===================== */
.industry{background:
  radial-gradient(80% 60% at 85% 30%,rgba(51,214,255,.12),transparent 60%),
  radial-gradient(70% 70% at 10% 90%,rgba(139,92,246,.18),transparent 60%),
  linear-gradient(160deg,var(--bg-1),var(--bg-2));
}
.bg-neural{
  position:absolute;inset:0;opacity:.5;z-index:0;
  background-image:
    radial-gradient(circle at 20% 30%,rgba(139,92,246,.25) 0 1px,transparent 1px),
    radial-gradient(circle at 60% 70%,rgba(51,214,255,.22) 0 1px,transparent 1px),
    radial-gradient(circle at 80% 20%,rgba(255,207,92,.18) 0 1px,transparent 1px);
  background-size:120px 120px,160px 160px,200px 200px;
  -webkit-mask-image:radial-gradient(circle at 70% 50%,#000,transparent 75%);
  mask-image:radial-gradient(circle at 70% 50%,#000,transparent 75%);
}
.kline{position:absolute;right:0;bottom:0;width:55%;height:55%;z-index:0;opacity:.55}
.kline svg{width:100%;height:100%}
.kline-path{fill:none;stroke:url(#g);stroke:var(--gold);stroke-width:3;
  stroke-dasharray:2000;stroke-dashoffset:2000;animation:draw 3.5s ease forwards}
.kline-area{fill:rgba(255,207,92,.08);stroke:none;opacity:0;animation:fade 2s 1s forwards}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes fade{to{opacity:1}}
.industry-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;max-width:var(--maxw);margin:0 auto;width:100%}
.industry-desc{color:var(--muted);font-size:17px;line-height:1.9;max-width:460px}
.industry-right{display:flex;flex-direction:column;gap:22px}
.stat-card{
  background:var(--glass);border:1px solid var(--glass-bd);border-radius:18px;
  padding:26px 30px;backdrop-filter:blur(12px);
  box-shadow:0 10px 40px rgba(0,0,0,.3);transition:.3s;
}
.stat-card:hover{transform:translateY(-4px);border-color:var(--gold)}
.stat-num{font-family:"Orbitron",sans-serif;font-size:clamp(34px,4vw,56px);font-weight:800;color:var(--gold);line-height:1;
  text-shadow:0 0 24px rgba(255,207,92,.35)}
.stat-num .unit{font-size:20px;margin-left:6px;color:var(--gold)}
.stat-label{margin-top:12px;color:var(--muted);font-size:15px}
.stat-label .up{color:#5dffa0;font-style:normal;font-weight:700}

/* ===================== 第3屏 红利 ===================== */
.dividend{background:
  radial-gradient(60% 60% at 50% 0%,rgba(139,92,246,.18),transparent 60%),
  linear-gradient(180deg,var(--bg-2),var(--bg-1));
  align-items:center;text-align:center}
.dividend-numbers{display:flex;gap:80px;justify-content:center;margin:30px 0 50px;flex-wrap:wrap}
.big-num{font-family:"Orbitron",sans-serif}
.big-num .counter{font-size:clamp(56px,8vw,96px);font-weight:800}
.big-num .suffix{font-size:clamp(28px,3vw,44px);color:var(--gold);font-weight:800;margin-left:4px}
.big-num p{margin-top:10px;color:var(--muted);font-size:16px}
.big-num .up{color:#5dffa0;font-style:normal;font-weight:700;margin-left:6px}
.salary-compare{display:flex;align-items:center;gap:30px;justify-content:center;flex-wrap:wrap}
.salary-card{
  width:260px;padding:30px;border-radius:18px;text-align:center;
}
.salary-card .tag{display:block;font-size:14px;color:var(--muted);margin-bottom:14px}
.salary-card .salary-val{font-family:"Orbitron",sans-serif;font-size:38px;font-weight:800}
.salary-card.grey{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1)}
.salary-card.grey .salary-val{color:#9aa0b5}
.salary-card.gold{background:linear-gradient(150deg,var(--gold),var(--gold-2));color:#1a1030;box-shadow:0 14px 40px rgba(255,182,39,.45)}
.salary-card.gold .tag{color:#5a3d00}
.vs{font-family:"Orbitron",sans-serif;font-size:34px;font-weight:800;color:var(--text);opacity:.8}
.dividend-foot{margin-top:44px;color:var(--muted);font-size:16px}
.dividend-foot b{font-size:20px}

/* ===================== 第4屏 岗位 ===================== */
.positions{background:
  radial-gradient(70% 60% at 80% 20%,rgba(51,214,255,.12),transparent 60%),
  linear-gradient(160deg,var(--bg-1),var(--bg-2));
  align-items:center}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:var(--maxw);margin:0 auto;width:100%}
.glass-card{
  background:var(--glass);border:1px solid var(--glass-bd);border-radius:20px;
  padding:34px 28px;backdrop-filter:blur(14px);transition:.35s;
  box-shadow:0 10px 40px rgba(0,0,0,.3);
}
.glass-card:hover{transform:translateY(-8px);border-color:var(--cyan);box-shadow:0 18px 50px rgba(51,214,255,.25)}
.gc-icon{font-size:40px;display:block;margin-bottom:16px}
.glass-card h3{font-size:21px;margin-bottom:10px}
.glass-card p{color:var(--muted);font-size:14.5px;line-height:1.7}
.gold-quote{text-align:center;margin-top:46px;font-size:clamp(18px,2vw,26px);color:var(--gold);font-weight:500;letter-spacing:1px;
  text-shadow:0 0 20px rgba(255,207,92,.2)}

/* ===================== 第5屏 价值 ===================== */
.value{background:radial-gradient(120% 90% at 50% 120%,#1a2a6c 0%,#0a0a2e 40%,#05030f 100%);align-items:center;justify-content:center;text-align:center}
.starfield{position:absolute;inset:0;width:100%;height:100%;z-index:0}
.value-inner{position:relative;z-index:2;max-width:980px}
.value-line{
  font-size:clamp(22px,2.8vw,40px);font-weight:700;line-height:1.5;margin:14px 0;
  opacity:0;transform:translateY(30px);
  transition:opacity .9s ease,transform .9s ease;transition-delay:calc(var(--d,0)*1s);
}
.value-line.in{opacity:1;transform:translateY(0)}
.value-line.big{font-size:clamp(28px,3.6vw,54px);font-weight:900}

/* ===================== 第6屏 课程 ===================== */
.courses{background:
  radial-gradient(60% 60% at 20% 80%,rgba(139,92,246,.16),transparent 60%),
  linear-gradient(180deg,var(--bg-2),var(--bg-1));
  align-items:center}
.course-row{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;max-width:var(--maxw);margin:0 auto;width:100%}
.course-card{
  border-radius:22px;padding:36px 26px;min-height:300px;
  background:rgba(255,255,255,.05);border:1px solid var(--glass-bd);
  transition:.4s;position:relative;overflow:hidden;display:flex;flex-direction:column;
}
.course-card:hover{transform:scale(1.06);z-index:2}
.course-card.y:hover{border-color:var(--gold);box-shadow:0 20px 60px rgba(255,182,39,.35)}
.course-card.p:hover{border-color:#c08bff;box-shadow:0 20px 60px rgba(192,139,255,.35)}
.course-card.b:hover{border-color:var(--cyan);box-shadow:0 20px 60px rgba(51,214,255,.35)}
.course-card.s:hover{border-color:var(--gold);box-shadow:0 20px 60px rgba(255,182,39,.45)}
.c-badge{font-size:34px}
.course-card h3{font-size:22px;margin:18px 0 12px}
.course-card p{color:var(--muted);font-size:15px;line-height:1.7}
.course-card.y{background:linear-gradient(170deg,rgba(255,207,92,.14),rgba(255,255,255,.03))}
.course-card.p{background:linear-gradient(170deg,rgba(139,92,246,.16),rgba(255,255,255,.03))}
.course-card.b{background:linear-gradient(170deg,rgba(51,214,255,.14),rgba(255,255,255,.03))}
.course-card.s{background:linear-gradient(170deg,rgba(255,182,39,.18),rgba(139,92,246,.1))}

/* ===================== 第7屏 合作 ===================== */
.coop{background:
  radial-gradient(70% 60% at 50% 30%,rgba(51,214,255,.12),transparent 60%),
  linear-gradient(160deg,var(--bg-1),var(--bg-2));
  align-items:center}
.coop-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(2,1fr);gap:20px;max-width:var(--maxw);margin:0 auto;width:100%}
.coop-cell{
  background:var(--glass);border:1px solid var(--glass-bd);border-radius:18px;
  padding:30px 18px;text-align:center;backdrop-filter:blur(10px);transition:.3s;
}
.coop-cell:hover{transform:translateY(-6px);border-color:var(--gold);box-shadow:0 14px 40px rgba(255,182,39,.22)}
.coop-ico{font-size:38px;display:block;margin-bottom:12px}
.coop-cell h4{font-size:18px;font-weight:600}

/* ===================== 第8屏 认证 ===================== */
.cert{background:
  radial-gradient(60% 70% at 80% 60%,rgba(139,92,246,.16),transparent 60%),
  linear-gradient(180deg,var(--bg-2),var(--bg-1));
  align-items:center}
.cert-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;max-width:var(--maxw);margin:0 auto;width:100%;align-items:center}
.cert-list{list-style:none;display:flex;flex-direction:column;gap:26px}
.cert-list li{display:flex;gap:18px;align-items:flex-start}
.dot-mark{flex:0 0 auto;width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(120deg,var(--gold),var(--gold-2));color:#1a1030;font-weight:800}
.cert-list h3{font-size:19px;margin-bottom:6px}
.cert-list p{color:var(--muted);font-size:14.5px;line-height:1.6}
.cert-wall{display:flex;flex-direction:column;gap:20px}
.cert-sample{
  background:linear-gradient(160deg,#1b1140,#0e0826);border:1px solid var(--glass-bd);
  border-radius:18px;padding:30px;position:relative;overflow:hidden;
  box-shadow:0 14px 50px rgba(0,0,0,.4);
}
.cert-sample::before{content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,transparent 40%,rgba(255,207,92,.12) 50%,transparent 60%)}
.cert-top{font-size:13px;color:var(--muted);letter-spacing:1px}
.cert-name{font-size:30px;font-weight:900;margin:18px 0;background:linear-gradient(100deg,var(--gold),#fff);-webkit-background-clip:text;background-clip:text;color:transparent}
.cert-seal{display:inline-block;border:1px solid var(--gold);color:var(--gold);padding:6px 16px;border-radius:30px;font-size:13px;letter-spacing:2px}
.logo-wall{display:flex;gap:12px;flex-wrap:wrap}
.logo-wall span{font-size:13px;padding:8px 14px;border-radius:10px;background:var(--glass);border:1px solid var(--glass-bd);color:var(--muted)}

/* ===================== 第9屏 关于 ===================== */
.about{background:
  radial-gradient(60% 60% at 50% 20%,rgba(255,207,92,.14),transparent 60%),
  linear-gradient(180deg,var(--bg-1),var(--bg-2));
  align-items:center;text-align:center}
.about-numbers{display:flex;gap:70px;justify-content:center;margin:30px 0 44px;flex-wrap:wrap}
.about-num .counter{font-family:"Orbitron",sans-serif;font-size:clamp(54px,7vw,86px);font-weight:800}
.about-num .suffix{font-size:clamp(26px,3vw,42px);color:var(--gold);font-weight:800;margin-left:4px}
.about-num p{margin-top:10px;color:var(--muted);font-size:16px}
.big-static{font-family:"Noto Sans SC",sans-serif;font-size:clamp(40px,5vw,64px);font-weight:900}
.about-summary{max-width:760px;margin:0 auto;color:var(--muted);font-size:17px;line-height:1.9}

/* ===================== 第10屏 转化 ===================== */
.convert{background:linear-gradient(180deg,var(--bg-2),#05020f);justify-content:flex-start;padding-top:90px}
.convert-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:60px;max-width:var(--maxw);margin:0 auto;width:100%;align-items:start}
.convert-desc{color:var(--muted);font-size:16px;line-height:1.8;margin-bottom:30px;max-width:420px}
.contact-list{list-style:none;display:flex;flex-direction:column;gap:18px}
.contact-list li{display:flex;gap:16px;align-items:center;padding-bottom:16px;border-bottom:1px solid rgba(255,255,255,.08)}
.c-key{color:var(--muted);font-size:14px;width:90px;flex:0 0 auto}
.c-val{font-size:17px;font-weight:600}
.convert-form{
  background:var(--glass);border:1px solid var(--glass-bd);border-radius:22px;
  padding:34px;backdrop-filter:blur(14px);box-shadow:0 16px 50px rgba(0,0,0,.4);
}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;color:var(--muted);margin-bottom:8px}
.field .req{color:#ff6b6b;font-style:normal}
.field input,.field select,.field textarea{
  width:100%;padding:13px 15px;border-radius:12px;font-size:15px;
  background:rgba(255,255,255,.06);border:1px solid var(--glass-bd);color:var(--text);
  font-family:inherit;transition:.25s;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--gold);background:rgba(255,255,255,.1)}
.field textarea{resize:vertical}
.checks{display:flex;flex-wrap:wrap;gap:10px 18px}
.chk{display:flex;align-items:center;gap:6px;font-size:14px;color:var(--text);cursor:pointer}
.chk input{width:auto}
.btn-submit{width:100%;justify-content:center;margin-top:6px;font-size:18px;padding:16px}
.form-ok{margin-top:14px;text-align:center;color:#5dffa0;font-weight:600}
.site-footer{margin-top:auto;padding-top:30px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.08);color:var(--muted);font-size:13px;max-width:var(--maxw);margin-left:auto;margin-right:auto;width:100%}

/* ===================== 滚动揭示动画 ===================== */
.reveal{opacity:0;transform:translateY(15px);transition:opacity .8s ease,transform .8s ease;transition-delay:calc(var(--d,0)*1s + .3s)}
.reveal.in{opacity:1;transform:translateY(0)}

/* ===================== 响应式（PC 优先，窄屏兜底） ===================== */
@media (max-width:980px){
  .industry-grid,.cert-grid,.convert-grid{grid-template-columns:1fr;gap:34px}
  .card-grid,.course-row{grid-template-columns:repeat(2,1fr)}
  .coop-grid{grid-template-columns:repeat(2,1fr)}
  .dot-nav{display:none}
}