/* ============================================================
   苍亚科技 · OPC 实战培训  多级页面
   设计方向：编辑感（Editorial）× 科技感 —— 深墨蓝 + 暖米白 + 活力橙
   ============================================================ */
:root{
  --ink:#0a1a2f;
  --ink-2:#0d2236;
  --paper:#f6f2e9;
  --paper-2:#efe8da;
  --white:#ffffff;
  --blue:#1f78c8;
  --blue-deep:#0b5394;
  --orange:#ed7d31;
  --orange-2:#f7a76c;
  --text:#16202e;
  --muted:#5b6573;
  --line:rgba(10,26,47,.14);
  --line-light:rgba(255,255,255,.14);
  --serif:"Noto Serif SC","Songti SC","STSong","SimSun",serif;
  --sans:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",sans-serif;
  --mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --max:1180px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--text);
  font-family:var(--sans);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
em{font-style:normal}
ul{margin:0}
::selection{background:var(--orange);color:#fff}

.container{width:min(var(--max),92vw);margin-inline:auto}
.eyebrow{
  font-family:var(--mono);font-size:.76rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--orange);display:inline-flex;align-items:center;gap:.6rem;margin:0 0 1rem;
}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--orange);display:inline-block}
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;line-height:1.16;letter-spacing:-.01em;margin:0}
.section-title{font-size:clamp(1.8rem,3.6vw,2.7rem)}
.lead{color:var(--muted);font-size:1.05rem;max-width:62ch;margin:1rem 0 0}
.section--ink .lead{color:rgba(255,255,255,.72)}

/* ---------------- Header ---------------- */
.site-header{
  position:sticky;top:0;z-index:60;background:rgba(10,26,47,.92);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line-light);
  transition:background .3s var(--ease);
}
.site-header.scrolled{background:rgba(7,18,31,.98);box-shadow:0 10px 30px rgba(0,0,0,.18)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:1.5rem;padding:.8rem 0}
.brand{display:flex;align-items:center;gap:.7rem;color:#fff;font-weight:700}
.brand .mark{
  width:36px;height:36px;display:grid;place-items:center;border:1px solid var(--orange);
  color:var(--orange);font-family:var(--mono);font-size:.8rem;letter-spacing:.05em;flex:none;
}
.brand .name{font-family:var(--serif);font-size:1.05rem;letter-spacing:.02em;line-height:1.1}
.brand small{display:block;font-family:var(--mono);font-size:.58rem;letter-spacing:.2em;color:rgba(255,255,255,.55);font-weight:400;margin-top:.2rem}
.nav-links{display:flex;align-items:center;gap:.25rem;list-style:none;margin:0;padding:0}
.nav-links a{color:rgba(255,255,255,.82);font-size:.9rem;padding:.5rem .8rem;border-radius:2px;transition:color .2s,background .2s}
.nav-links a:hover,.nav-links a.active{color:#fff;background:rgba(255,255,255,.08)}
.nav-item{position:relative}
.nav-menu{
  position:absolute;top:calc(100% + 12px);left:0;min-width:238px;background:#fff;
  border:1px solid var(--line);box-shadow:0 20px 44px rgba(10,26,47,.18);padding:.45rem;
  display:none;flex-direction:column;z-index:70;
}
.nav-item:hover .nav-menu,.nav-item:focus-within .nav-menu{display:flex}
.nav-menu a{color:var(--text);display:block;padding:.55rem .7rem;font-size:.88rem}
.nav-menu a:hover{background:var(--paper)}
.nav-menu .muted{color:var(--muted);font-size:.72rem;font-family:var(--mono);letter-spacing:.06em;padding:.5rem .7rem .2rem}
.nav-actions{display:flex;align-items:center;gap:.6rem}
.nav-toggle{
  display:none;background:none;border:1px solid var(--line-light);color:#fff;
  width:42px;height:42px;font-size:1.1rem;cursor:pointer;border-radius:2px;
}
.mobile-panel{display:none;background:var(--ink);border-top:1px solid var(--line-light)}
.site-header.nav-open .mobile-panel{display:block}
.mobile-panel .mp-inner{padding:1rem 0 1.4rem}
.mobile-panel a{display:block;color:#fff;padding:.75rem 0;border-bottom:1px solid var(--line-light);font-size:.98rem}
.mobile-panel a.sub{padding-left:1rem;font-size:.88rem;color:rgba(255,255,255,.72)}
.mobile-panel a.cta{color:var(--orange);font-weight:700;border:0;margin-top:.8rem}

/* ---------------- Buttons ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55rem;
  font-weight:600;font-size:.95rem;padding:.85rem 1.4rem;border-radius:2px;
  border:1px solid transparent;cursor:pointer;font-family:var(--sans);
  transition:transform .2s var(--ease),background .2s,color .2s,border-color .2s;
}
.btn .arrow{transition:transform .25s var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}
.btn--primary{background:var(--orange);color:#fff}
.btn--primary:hover{background:#d9661d}
.btn--dark{background:var(--ink);color:#fff}
.btn--dark:hover{background:#06111f}
.btn--ghost{border-color:currentColor;color:inherit;background:transparent}
.btn--ghost:hover{background:rgba(255,255,255,.1)}
.btn--outline{border-color:var(--ink);color:var(--ink);background:transparent}
.btn--outline:hover{background:var(--ink);color:#fff}
.btn--sm{padding:.55rem 1rem;font-size:.85rem}
.btn--block{width:100%}

/* ---------------- Hero ---------------- */
.hero{
  position:relative;background:var(--ink);color:#fff;overflow:hidden;isolation:isolate;
  padding:clamp(4rem,9vw,8rem) 0 clamp(3.5rem,7vw,6rem);
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-2;background:
    radial-gradient(120% 90% at 86% -12%, rgba(237,125,49,.30), transparent 55%),
    radial-gradient(80% 70% at 0% 112%, rgba(31,120,200,.22), transparent 60%),
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px) 0 0/64px 64px,
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px) 0 0/64px 64px;
}
.hero::after{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;opacity:.05;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.55'/></svg>");
}
.hero--sub{padding:clamp(3rem,6vw,5rem) 0 clamp(2.6rem,5vw,3.6rem)}
.hero-inner{max-width:920px}
.hero h1{font-size:clamp(2.4rem,6.2vw,4.7rem);letter-spacing:-.02em}
.hero h1 .accent{color:var(--orange-2)}
.hero .lead{color:rgba(255,255,255,.78);font-size:clamp(1rem,1.6vw,1.18rem);max-width:54ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:2rem}
.hero-note{margin-top:1.5rem;font-family:var(--mono);font-size:.72rem;letter-spacing:.12em;color:rgba(255,255,255,.5);text-transform:uppercase}
.breadcrumb{font-family:var(--mono);font-size:.74rem;letter-spacing:.08em;color:rgba(255,255,255,.55);margin-bottom:1rem}
.breadcrumb a:hover{color:var(--orange)}

/* ---------------- Stats ---------------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line-light);border:1px solid var(--line-light);margin-top:clamp(2.5rem,5vw,4rem)}
.stat{background:rgba(255,255,255,.03);padding:1.3rem 1.2rem}
.stat .num{font-family:var(--serif);font-size:clamp(1.8rem,3vw,2.6rem);color:#fff;line-height:1}
.stat .num span{color:var(--orange)}
.stat .lbl{font-size:.78rem;color:rgba(255,255,255,.62);margin-top:.45rem}

/* ---------------- Sections ---------------- */
.section{padding:clamp(4rem,8vw,6.5rem) 0}
.section--paper{background:var(--paper)}
.section--paper2{background:var(--paper-2)}
.section--ink{background:var(--ink);color:#fff}
.section--flush{padding-top:0}
.section-head{margin-bottom:2.6rem;max-width:72ch}

.grid{display:grid;gap:1.4rem}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* ---------------- Cards ---------------- */
.card{background:#fff;border:1px solid var(--line);padding:1.8rem;border-radius:2px;transition:transform .3s var(--ease),border-color .3s,box-shadow .3s}
.card:hover{transform:translateY(-5px);border-color:var(--ink);box-shadow:0 20px 40px rgba(10,26,47,.1)}
.card .k{font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;color:var(--orange);text-transform:uppercase}
.card h3{font-size:1.32rem;margin:.7rem 0 .5rem}
.card p{color:var(--muted);margin:0;font-size:.94rem}
.card--ink{background:var(--ink);color:#fff;border-color:rgba(255,255,255,.12)}
.card--ink p{color:rgba(255,255,255,.72)}
.card--ink h3{color:#fff}

/* ---------------- Course cards ---------------- */
.courses{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem;align-items:stretch}
.course{display:flex;flex-direction:column;position:relative;background:#fff;border:1px solid var(--line);padding:1.7rem;transition:transform .3s var(--ease),box-shadow .3s,border-color .3s}
.course:hover{transform:translateY(-6px);box-shadow:0 24px 50px rgba(10,26,47,.12);border-color:var(--ink)}
.course .idx{font-family:var(--mono);font-size:.72rem;letter-spacing:.16em;color:var(--orange)}
.course h3{font-size:1.3rem;margin:.45rem 0 .2rem}
.course .sub{font-size:.84rem;color:var(--muted);margin-bottom:.9rem}
.course .price{font-family:var(--serif);font-size:2.3rem;color:var(--ink);line-height:1;margin:.2rem 0 .3rem}
.course .price small{font-family:var(--sans);font-size:.82rem;color:var(--muted);font-weight:400}
.meta{display:flex;gap:.45rem;flex-wrap:wrap;margin:.5rem 0 1rem}
.tag{font-size:.72rem;font-family:var(--mono);letter-spacing:.04em;border:1px solid var(--line);padding:.18rem .5rem;color:var(--muted)}
.course ul{list-style:none;padding:0;margin:0 0 1.4rem;display:grid;gap:.45rem}
.course li{position:relative;padding-left:1.1rem;font-size:.9rem;color:var(--text)}
.course li::before{content:"";position:absolute;left:0;top:.62em;width:5px;height:5px;background:var(--orange)}
.course .go{margin-top:auto;display:inline-flex;align-items:center;gap:.4rem;color:var(--blue-deep);font-weight:600;font-size:.9rem}
.course:hover .go{color:var(--orange)}
.course--feature{background:var(--ink);color:#fff;border-color:var(--ink)}
.course--feature h3,.course--feature .price{color:#fff}
.course--feature .sub,.course--feature .price small{color:rgba(255,255,255,.6)}
.course--feature li{color:rgba(255,255,255,.85)}
.course--feature .tag{border-color:rgba(255,255,255,.22);color:rgba(255,255,255,.7)}
.course--feature .go{color:var(--orange-2)}

/* ---------------- Chips ---------------- */
.chips{display:flex;flex-wrap:wrap;gap:.55rem}
.chip{border:1px solid var(--line);background:#fff;padding:.42rem .8rem;font-size:.84rem}
.section--ink .chip{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.16)}

/* ---------------- Timeline (vertical) ---------------- */
.timeline{position:relative;display:grid;border-left:1px solid var(--line);margin-left:.4rem}
.tl-item{position:relative;padding:0 0 1.8rem 1.6rem}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-5px;top:.55rem;width:9px;height:9px;background:var(--orange);border:2px solid var(--paper)}
.tl-item .when{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;color:var(--orange);text-transform:uppercase}
.tl-item h4{font-family:var(--sans);font-weight:700;font-size:1.02rem;margin:.2rem 0 .3rem}
.tl-item p{margin:0;color:var(--muted);font-size:.9rem}

/* ---------------- Stages (horizontal) ---------------- */
.stages{display:grid;grid-template-columns:repeat(6,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.stage{background:#fff;padding:1.15rem}
.stage .i{font-family:var(--mono);font-size:.7rem;color:var(--orange);letter-spacing:.1em}
.stage h4{font-family:var(--sans);font-size:.92rem;margin:.4rem 0 .2rem}
.stage .when{font-size:.72rem;color:var(--muted)}
.stage .income{font-size:.8rem;color:var(--blue-deep);font-weight:700;margin-top:.5rem}
.stage p{font-size:.76rem;color:var(--muted);margin:.3rem 0 0;line-height:1.55}

/* ---------------- Steps ---------------- */
.steps{display:grid;gap:1rem}
.step{display:flex;gap:1rem;align-items:flex-start;padding:1.2rem;border:1px solid var(--line);background:#fff}
.step .no{font-family:var(--mono);font-size:.95rem;color:var(--orange);border:1px solid var(--orange);width:34px;height:34px;display:grid;place-items:center;flex:none}
.step h4{font-family:var(--sans);font-size:1rem;margin:.1rem 0 .2rem}
.step p{margin:0;color:var(--muted);font-size:.88rem}

/* ---------------- Table ---------------- */
.tbl{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line)}
.tbl th,.tbl td{border:1px solid var(--line);padding:.8rem 1rem;text-align:left;font-size:.9rem;vertical-align:top}
.tbl th{background:var(--ink);color:#fff;font-weight:600;font-family:var(--sans)}
.tbl tbody tr:nth-child(even) td{background:#fbf9f4}

/* ---------------- Split layout ---------------- */
.split{display:grid;grid-template-columns:1.6fr 1fr;gap:clamp(1.5rem,4vw,3rem);align-items:start}
.aside{position:sticky;top:92px;background:#fff;border:1px solid var(--line);padding:1.4rem}
.aside h4{font-family:var(--sans);font-size:.95rem;margin:0 0 .6rem}
.aside .price-lg{font-family:var(--serif);font-size:2.4rem;color:var(--ink);line-height:1}
.aside .price-lg small{font-family:var(--sans);font-size:.8rem;color:var(--muted);font-weight:400}
.aside ul{list-style:none;padding:0;margin:1rem 0;display:grid;gap:.5rem}
.aside li{font-size:.86rem;color:var(--muted);padding-left:1rem;position:relative}
.aside li::before{content:"·";position:absolute;left:0;color:var(--orange);font-weight:700}

/* ---------------- Price tiles ---------------- */
.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.tile{background:#fff;border:1px solid var(--line);padding:1.2rem}
.tile .t-k{font-size:.78rem;color:var(--muted)}
.tile .t-v{font-family:var(--serif);font-size:1.7rem;color:var(--ink);line-height:1.1;margin-top:.3rem}
.tile .t-v small{font-family:var(--sans);font-size:.78rem;color:var(--muted);font-weight:400}

/* ---------------- FAQ ---------------- */
.faq{display:grid;gap:.8rem}
details{background:#fff;border:1px solid var(--line);padding:0 1.2rem}
summary{list-style:none;cursor:pointer;padding:1.1rem 0;font-weight:600;display:flex;justify-content:space-between;gap:1rem;align-items:center}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-family:var(--mono);color:var(--orange);font-size:1.2rem;line-height:1}
details[open] summary::after{content:"–"}
details .ans{padding:0 0 1.2rem;color:var(--muted);font-size:.95rem}

/* ---------------- Form ---------------- */
.form-card{background:#fff;border:1px solid var(--line);padding:clamp(1.4rem,4vw,2.4rem)}
.field{display:grid;gap:.4rem;margin-bottom:1rem}
.field label{font-size:.85rem;font-weight:600}
.field label .req{color:var(--orange)}
input,select,textarea{
  font-family:var(--sans);font-size:.95rem;padding:.75rem .85rem;border:1px solid var(--line);
  background:#fdfcf9;color:var(--text);border-radius:2px;width:100%;
}
input:focus,select:focus,textarea:focus{outline:2px solid rgba(237,125,49,.35);border-color:var(--orange)}
textarea{resize:vertical;min-height:96px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.form-note{font-size:.8rem;color:var(--muted);margin-top:.9rem}
.form-msg{display:none;margin-top:1rem;padding:.9rem 1rem;border-left:3px solid var(--orange);background:var(--paper);font-size:.9rem}
.form-msg.show{display:block}
.form-msg.ok{border-left-color:#1f8a4c}
.form-msg.err{border-left-color:#c0392b}

/* ---------------- CTA band ---------------- */
.cta-band{position:relative;background:var(--ink);color:#fff;padding:clamp(3rem,6vw,4.5rem) 0;overflow:hidden;isolation:isolate}
.cta-band::before{content:"";position:absolute;inset:0;z-index:-1;background:radial-gradient(90% 140% at 100% 0%, rgba(237,125,49,.32), transparent 55%)}
.cta-band .inner{display:flex;justify-content:space-between;align-items:center;gap:2rem;flex-wrap:wrap}
.cta-band h2{font-size:clamp(1.6rem,3.2vw,2.4rem)}
.cta-band p{color:rgba(255,255,255,.72);margin:.6rem 0 0}

/* ---------------- Footer ---------------- */
.site-footer{background:#07121f;color:rgba(255,255,255,.65);padding:3rem 0 2rem}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:2rem}
.footer-brand .brand{margin-bottom:1rem}
.footer-brand p{font-size:.86rem;color:rgba(255,255,255,.55);max-width:34ch}
.footer-col h5{color:#fff;font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;margin:0 0 .8rem}
.footer-col a{display:block;padding:.25rem 0;font-size:.86rem;color:rgba(255,255,255,.62)}
.footer-col a:hover{color:var(--orange)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:2rem;padding-top:1.2rem;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;font-size:.76rem;color:rgba(255,255,255,.45)}

/* ---------------- Reveal ---------------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------------- Product grid ---------------- */
.products{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem}
.product{background:#fff;border:1px solid var(--line);padding:1.4rem;display:flex;flex-direction:column;gap:.45rem;transition:transform .3s var(--ease),border-color .3s,box-shadow .3s}
.product:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:0 16px 34px rgba(10,26,47,.09)}
.product .p-k{font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;color:var(--orange);text-transform:uppercase}
.product h4{font-family:var(--sans);font-size:1rem;line-height:1.4}
.product p{margin:0;font-size:.86rem;color:var(--muted)}
.product--ink{background:var(--ink);border-color:var(--ink)}
.product--ink h4{color:#fff}
.product--ink p{color:rgba(255,255,255,.7)}
.product--ink .p-k{color:var(--orange-2)}

/* ---------------- Screenshot gallery ---------------- */
.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:1.2rem}
.gallery figure{margin:0;background:#fff;border:1px solid var(--line);overflow:hidden}
.gallery img{width:100%;height:auto;border-bottom:1px solid var(--line);background:var(--ink)}
.gallery figcaption{padding:.85rem 1rem;font-size:.84rem;color:var(--muted)}
.gallery figcaption b{display:block;color:var(--text);font-size:.92rem;margin-bottom:.15rem;font-weight:700}
.gallery .wide{grid-column:1/-1}

/* ---------------- Stat bar (light) ---------------- */
.statbar{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.statbar > div{background:#fff;padding:1.3rem 1.2rem}
.statbar .num{font-family:var(--serif);font-size:clamp(1.7rem,2.6vw,2.2rem);color:var(--ink);line-height:1}
.statbar .num span{color:var(--orange)}
.statbar .lbl{font-size:.76rem;color:var(--muted);margin-top:.4rem}

/* ---------------- Modules ---------------- */
.modules{display:grid;gap:1px;background:var(--line);border:1px solid var(--line)}
.module{background:#fff;padding:1.2rem 1.3rem;display:flex;gap:1rem;align-items:flex-start}
.module .m-no{font-family:var(--mono);color:var(--orange);font-size:.78rem;letter-spacing:.1em;flex:none;padding-top:.2rem}
.module h4{font-family:var(--sans);font-size:1rem;margin:0 0 .25rem}
.module p{margin:0;font-size:.88rem;color:var(--muted)}

/* ---------------- Checklist ---------------- */
.checklist{list-style:none;padding:0;margin:0;display:grid;gap:.6rem}
.checklist li{padding-left:1.5rem;position:relative;font-size:.92rem}
.checklist li::before{content:"✓";position:absolute;left:0;color:var(--orange);font-weight:700}

/* ---------------- Anchor nav ---------------- */
.anchor-nav{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:2.4rem}
.anchor-nav a{font-size:.82rem;border:1px solid var(--line);padding:.38rem .75rem;background:#fff;color:var(--muted);transition:background .2s,color .2s}
.anchor-nav a:hover{background:var(--ink);color:#fff;border-color:var(--ink)}

/* ---------------- Callout ---------------- */
.callout{background:var(--paper-2);border-left:3px solid var(--orange);padding:1rem 1.2rem;font-size:.92rem}
.callout strong{color:var(--ink)}
.section--ink .callout{background:rgba(255,255,255,.06);color:rgba(255,255,255,.75)}
.section--ink .callout strong{color:#fff}

/* ---------------- Meta strip ---------------- */
.meta-strip{display:flex;flex-wrap:wrap;gap:1.6rem 2.4rem;margin-top:1.8rem;font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;color:rgba(255,255,255,.55);text-transform:uppercase}
.meta-strip b{display:block;color:#fff;font-family:var(--sans);font-size:1.05rem;letter-spacing:0;margin-top:.15rem;text-transform:none}

/* ---------------- Highlight ---------------- */
.hl{background:linear-gradient(transparent 60%,rgba(237,125,49,.3) 60%)}

/* ---------------- Utilities ---------------- */
.center{text-align:center}
.mt-2{margin-top:2rem}
.mt-3{margin-top:3rem}
.note{font-size:.82rem;color:var(--muted)}
.divider{height:1px;background:var(--line);margin:2rem 0}
.list-plain{list-style:none;padding:0;display:grid;gap:.6rem}
.list-plain li{padding-left:1.2rem;position:relative;font-size:.93rem}
.list-plain li::before{content:"—";position:absolute;left:0;color:var(--orange)}

/* ---------------- Responsive ---------------- */
@media (max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .stages{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:960px){
  .nav-links{display:none}
  .nav-toggle{display:block}
  .grid-3,.grid-2,.courses,.products,.gallery{grid-template-columns:1fr}
  .split{grid-template-columns:1fr}
  .aside{position:static}
  .tiles{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .anchor-nav{margin-bottom:1.8rem}
}
@media (max-width:640px){
  .stats,.statbar{grid-template-columns:1fr 1fr}
  .stages{grid-template-columns:1fr 1fr}
  .two{grid-template-columns:1fr}
  .cta-band .inner{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr}
  .hero-cta .btn{flex:1 1 auto}
  .meta-strip{gap:1rem 1.6rem}
  .module{flex-direction:row}
}