/* ============================================================
   공구트렌드 (TOOLTREND) — Landing styles
   Industrial theme: safety orange + graphite steel
   (design system ported from web_dev/bid_gen, re-tokenised)
   ============================================================ */
:root{
  --navy:#1c2027;          /* graphite steel — headings / dark areas / footer */
  --ink:#23272f;
  --ink-2:#646b76;         /* steel-gray muted text */
  --primary:#EC5A13;       /* safety orange */
  --primary-2:#C2410C;     /* deep burnt orange (hover) */
  --sky:#F59E0B;           /* amber highlight */
  --teal:#3f7c9c;          /* steel blue — technical/spec tags */
  --ok:#2E7D46;
  --indigo:#2c3038;
  --grad:linear-gradient(120deg,#F7A23B 0%,#EF5F10 46%,#C2410C 100%);
  --grad-soft:linear-gradient(120deg,#fff3e9 0%,#fff7f0 100%);
  --bg:#ffffff;
  --bg-soft:#f4f5f7;       /* cool concrete neutral */
  --bg-soft2:#eef0f3;
  --line:#e3e6ea;
  --line-2:#eef0f3;
  --card:#ffffff;
  --tint:#fdece0;          /* light orange chip bg */
  --tint-steel:#e8f0f4;    /* light steel chip bg */
  --radius:16px;
  --radius-lg:22px;
  --radius-sm:10px;
  --shadow-sm:0 1px 2px rgba(20,22,28,.06);
  --shadow:0 12px 30px rgba(28,32,40,.10);
  --shadow-lg:0 26px 60px rgba(20,22,28,.18);
  --container:1200px;
  --gutter:24px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- reset / base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"Pretendard","Pretendard Variable",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","Apple SD Gothic Neo","Malgun Gothic",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  letter-spacing:-.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{margin:0;color:var(--navy);line-height:1.25;letter-spacing:-.02em;font-weight:800}
p{margin:0}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
sup{font-size:.6em}
.skip-link{position:absolute;left:-999px;top:0;background:var(--navy);color:#fff;padding:10px 16px;border-radius:0 0 8px 0;z-index:200}
.skip-link:focus{left:0}
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter)}
.mo-br{display:none}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:700;font-size:15px;line-height:1;white-space:nowrap;
  padding:13px 22px;border-radius:10px;transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s,color .18s;
  border:1.5px solid transparent;
}
.btn:active{transform:translateY(1px)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-lg{padding:16px 30px;font-size:16px}
.btn-block{display:flex;width:100%}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(236,90,19,.28)}
.btn-primary:hover{background:var(--primary-2);transform:translateY(-2px);box-shadow:0 12px 26px rgba(236,90,19,.34)}
.btn-ghost{background:#fff;color:var(--primary);border-color:#f6cdb2}
.btn-ghost:hover{border-color:var(--primary);background:#fff7f2;transform:translateY(-2px)}
.btn-invert{background:#fff;color:var(--navy)}
.btn-invert:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(0,0,0,.20)}
.btn-outline-invert{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn-outline-invert:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-2px)}

.eyebrow{display:inline-block;font-size:13px;font-weight:800;letter-spacing:.06em;color:var(--primary);text-transform:uppercase;margin-bottom:14px}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- brand wordmark ---------- */
.brand-word{display:inline-flex;align-items:center;gap:10px}
.brand-mark{width:38px;height:38px;flex:none;border-radius:11px;display:grid;place-items:center;color:#fff;background:var(--grad);box-shadow:0 6px 16px rgba(236,90,19,.30)}
.brand-txt{display:flex;flex-direction:column;line-height:1.05}
.brand-txt b{font-size:18px;font-weight:900;color:var(--navy);letter-spacing:-.02em}
.brand-txt i{font-size:9.5px;font-style:normal;font-weight:800;letter-spacing:.22em;color:var(--ink-2);margin-top:3px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.9);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid transparent;transition:box-shadow .25s,border-color .25s,background .25s}
.site-header.is-scrolled{box-shadow:0 6px 24px rgba(20,22,28,.08);border-color:var(--line-2)}
.header-inner{display:flex;align-items:center;gap:24px;height:70px}
.brand{display:flex;align-items:center}
.nav{margin-left:8px}
.nav-list{display:flex;gap:28px}
.nav-list a{font-size:15px;font-weight:600;color:#39404b;padding:8px 0;position:relative;transition:color .2s}
.nav-list a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--grad);transition:width .25s var(--ease)}
.nav-list a:hover{color:var(--navy)}
.nav-list a:hover::after{width:100%}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px;border-radius:8px}
.nav-toggle span{width:22px;height:2px;background:var(--navy);border-radius:2px;transition:transform .25s,opacity .2s}
.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;overflow:hidden;padding:84px 0 96px;background:linear-gradient(180deg,#fbf9f7 0%,#fff 78%)}
.hero-bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.blob{position:absolute;border-radius:50%;filter:blur(60px);opacity:.5}
.blob-1{width:520px;height:520px;top:-160px;right:-120px;background:radial-gradient(circle at 30% 30%,#ffcfa1,#F7A23B 55%,transparent 70%)}
.blob-2{width:440px;height:440px;bottom:-180px;left:-120px;background:radial-gradient(circle at 50% 50%,#b9c6d2,#5b6b7a 60%,transparent 72%);opacity:.24}
.grid-overlay{position:absolute;inset:0;background-image:linear-gradient(rgba(236,90,19,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(236,90,19,.05) 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 30%,transparent 75%)}
.hero-inner{position:relative;z-index:1;max-width:1240px;margin-inline:auto;text-align:center;display:grid;grid-template-columns:1fr minmax(300px,680px) 1fr;align-items:center;gap:16px}
.hero-copy{grid-column:2;display:flex;flex-direction:column;align-items:center}
.hero-title{font-size:clamp(32px,4.4vw,54px);font-weight:900;letter-spacing:-.03em;margin-bottom:20px}
.hero-sub{font-size:clamp(16px,1.5vw,18px);color:var(--ink-2);max-width:640px;margin:0 auto 30px}
.hero-sub strong{color:var(--navy);font-weight:700}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-bottom:30px}
.hero-badges{display:flex;flex-wrap:wrap;justify-content:center;gap:10px 22px}
.hero-badges li{font-size:14px;color:var(--ink-2);position:relative;padding-left:22px}
.hero-badges li::before{content:"";position:absolute;left:0;top:7px;width:12px;height:12px;border-radius:50%;background:var(--grad)}
.hero-badges strong{color:var(--navy)}

/* ---------- hero flanking 3D tools ---------- */
.tool-defs{position:absolute;width:0;height:0;overflow:hidden}
.ht{width:100%;max-width:300px;height:auto;display:block}
.ht-left{grid-column:1;justify-self:start}
.ht-right{grid-column:3;justify-self:end}
@keyframes ta-spin{to{transform:rotate(360deg)}}
.ta-gear{transform-box:fill-box;transform-origin:center;animation:ta-spin 26s linear infinite}
@keyframes ta-float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.tool-cluster{transform-box:fill-box;transform-origin:center;animation:ta-float 6s ease-in-out infinite}

/* ---------- trust strip ---------- */
.trust-strip{border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2);background:var(--bg-soft)}
.trust-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:30px 0}
.trust-item{text-align:center}
.trust-item strong{display:block;font-size:clamp(24px,3vw,34px);font-weight:900;color:var(--navy);letter-spacing:-.02em}
.trust-item span{font-size:13.5px;color:var(--ink-2)}
.trust-item+.trust-item{border-left:1px solid var(--line)}

/* ---------- section base ---------- */
.section{padding:92px 0}
.section-head{margin-bottom:46px;display:flex;flex-direction:column}
.section-head.center{align-items:center;text-align:center}
.section-title{font-size:clamp(26px,3vw,38px);font-weight:900}
.section-desc{margin-top:14px;font-size:16px;color:var(--ink-2);max-width:640px}
.section-head .section-title::after{content:"";display:block;width:52px;height:4px;border-radius:3px;background:var(--grad);margin-top:16px}
.section-head.center .section-title::after{margin-left:auto;margin-right:auto}
.section-note{margin-top:26px;text-align:center;font-size:12.5px;color:var(--ink-2)}
.section-note strong{color:var(--primary-2);font-weight:700}

/* ---------- about (engine cards) ---------- */
.engine-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.engine-card{text-align:center;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:34px 28px;transition:transform .25s var(--ease),box-shadow .25s,border-color .25s}
.engine-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#f3c9ae}
.engine-card.featured{background:linear-gradient(180deg,#fff6ef,#fff);border-color:#f6cdb2}
.engine-ic{width:56px;height:56px;margin:0 auto 20px;border-radius:16px;display:grid;place-items:center;color:#fff;background:var(--grad);box-shadow:0 10px 22px rgba(236,90,19,.28)}
.engine-tag{display:inline-block;font-size:12px;font-weight:800;color:var(--teal);background:var(--tint-steel);padding:5px 12px;border-radius:99px;margin-bottom:12px}
.engine-card h3{font-size:21px;margin-bottom:10px}
.engine-card p{color:var(--ink-2);font-size:15px}

/* ---------- categories (comprehensive panels) ---------- */
.cat-section{background:var(--bg-soft)}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px}
.cat-card{text-align:left;padding:24px 22px;border-radius:var(--radius);border:1px solid var(--line);background:#fff;transition:transform .25s var(--ease),box-shadow .25s,border-color .25s}
.cat-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#f3c9ae}
.cat-card-head{display:flex;align-items:center;gap:13px;margin-bottom:16px}
.cat-ic{width:48px;height:48px;flex:none;border-radius:13px;display:grid;place-items:center;color:var(--primary);background:var(--tint);transition:background .25s,color .25s}
.cat-card:hover .cat-ic{background:var(--grad);color:#fff}
.cat-card h3{font-size:17px;color:var(--navy)}
.cat-tags{display:flex;flex-wrap:wrap;gap:7px}
.cat-tags li{font-size:12px;font-weight:600;color:#4d5461;background:var(--bg-soft2);border:1px solid var(--line);padding:5px 11px;border-radius:99px;transition:background .2s,color .2s,border-color .2s}
.cat-card:hover .cat-tags li{background:var(--tint);border-color:#f6d6bd;color:var(--primary-2)}

/* ---------- 공구 데이터 (spec sheets) ---------- */
.filter-tabs{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:36px}
.filter-tab{font-size:14px;font-weight:700;color:var(--ink-2);background:#fff;border:1.5px solid var(--line);padding:9px 18px;border-radius:99px;transition:color .2s,background .2s,border-color .2s,box-shadow .2s,transform .18s}
.filter-tab:hover{border-color:var(--primary);color:var(--primary)}
.filter-tab.is-active{background:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 6px 16px rgba(236,90,19,.26)}
.spec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.spec-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 22px 24px;box-shadow:var(--shadow-sm);transition:transform .25s var(--ease),box-shadow .25s,border-color .25s}
.spec-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:#f3c9ae}
.spec-card.is-hidden{display:none}
.spec-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.spec-ic{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;color:#fff;background:var(--grad);box-shadow:0 8px 18px rgba(236,90,19,.26)}
.spec-badge{font-size:10.5px;font-weight:800;color:var(--sky);background:#fff5e0;border:1px solid #f6e2b4;padding:3px 9px;border-radius:99px;letter-spacing:.02em}
.spec-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:9px}
.spec-tag{font-size:11px;font-weight:800;color:var(--teal);background:var(--tint-steel);padding:4px 10px;border-radius:99px}
.spec-tag.brand{color:#fff;background:var(--navy)}
.spec-name{font-size:17.5px;color:var(--navy);margin-bottom:4px;line-height:1.3}
.spec-name .spec-en{display:block;font-size:11.5px;font-weight:600;color:var(--ink-2);letter-spacing:.02em;margin-top:3px}
.spec-table{width:100%;border-collapse:collapse;margin:14px 0 16px}
.spec-table th,.spec-table td{padding:8px 0;border-bottom:1px dashed var(--line);vertical-align:top;text-align:left}
.spec-table th{width:74px;padding-right:12px;font-size:12px;font-weight:700;color:var(--ink-2);white-space:nowrap}
.spec-table td{font-size:13.5px;font-weight:600;color:var(--ink)}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:none}
.spec-feats{margin-top:auto;display:flex;flex-direction:column;gap:7px;padding-top:14px;border-top:1px solid var(--line-2)}
.spec-feats li{position:relative;padding-left:18px;font-size:13px;color:var(--ink-2);line-height:1.45}
.spec-feats li::before{content:"";position:absolute;left:0;top:6px;width:8px;height:8px;border-radius:2px;background:var(--grad);transform:rotate(45deg)}

/* ---------- 구축 협업 문의 (dark band) ---------- */
.collab-section{position:relative;overflow:hidden;background:var(--navy);color:#fff}
.collab-bg{position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.9}
.collab-bg .pb-decor{position:absolute;inset:0;background-image:radial-gradient(circle at 16% 30%,rgba(247,162,59,.30) 0 2px,transparent 3px),radial-gradient(circle at 74% 62%,rgba(255,255,255,.14) 0 2px,transparent 3px),radial-gradient(circle at 52% 18%,rgba(247,162,59,.20) 0 2px,transparent 3px),radial-gradient(circle at 88% 34%,rgba(255,255,255,.12) 0 2px,transparent 3px),radial-gradient(circle at 32% 76%,rgba(247,162,59,.18) 0 2px,transparent 3px)}
.collab-bg .pb-decor::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:42px 42px;-webkit-mask-image:radial-gradient(ellipse 72% 100% at 50% 50%,#000,transparent 76%);mask-image:radial-gradient(ellipse 72% 100% at 50% 50%,#000,transparent 76%)}
.collab-section>.container{position:relative;z-index:1}
.collab-head .section-title{color:#fff}
.collab-head .section-desc{color:rgba(255,255,255,.74)}
.collab-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.collab-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:26px 24px;transition:transform .25s var(--ease),background .25s,border-color .25s}
.collab-card:hover{transform:translateY(-5px);background:rgba(255,255,255,.09);border-color:rgba(255,255,255,.24)}
.collab-ic{width:48px;height:48px;border-radius:12px;background:var(--grad);color:#fff;display:grid;place-items:center;margin-bottom:16px;box-shadow:0 10px 22px rgba(236,90,19,.32)}
.collab-card h4{color:#fff;font-size:17px;margin-bottom:8px}
.collab-card p{color:rgba(255,255,255,.72);font-size:14px}
.collab-cta{text-align:center;margin-top:36px;position:relative;z-index:1}

/* ---------- 구매처 (store cards) ---------- */
.buy-section{background:var(--bg-soft)}
.store-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:920px;margin:0 auto}
.store-card{display:flex;gap:20px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px 28px;box-shadow:var(--shadow-sm);transition:transform .25s var(--ease),box-shadow .25s,border-color .25s}
.store-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.store-logo{width:64px;height:64px;flex:none;border-radius:16px;display:grid;place-items:center;font-size:30px;font-weight:900;color:#fff;font-family:Arial,sans-serif}
.store-logo-naver{background:#03C75A}
.store-logo-coupang{background:#D6001C}
.store-kicker{display:block;font-size:12px;font-weight:800;letter-spacing:.03em;text-transform:uppercase;margin-bottom:5px}
.store-naver .store-kicker{color:#03C75A}
.store-coupang .store-kicker{color:#D6001C}
.store-card h3{font-size:19px;margin-bottom:8px}
.store-body p{font-size:13.5px;color:var(--ink-2);margin-bottom:13px;line-height:1.55}
.store-cta{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:800;color:var(--primary)}
.store-cta span{transition:transform .2s var(--ease)}
.store-card:hover .store-cta span{transform:translateX(4px)}
.store-naver:hover{border-color:#03C75A}
.store-coupang:hover{border-color:#D6001C}

/* ---------- faq ---------- */
.faq{max-width:840px;margin:0 auto}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:11px;padding:0 22px;box-shadow:var(--shadow-sm)}
.faq summary{cursor:pointer;font-weight:700;color:var(--navy);font-size:16px;padding:18px 0;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--primary);font-size:24px;font-weight:400;flex:none;line-height:1}
.faq details[open] summary::after{content:"\2013"}
.faq details p{padding:0 0 18px;color:var(--ink-2);font-size:14.5px;line-height:1.65}

/* ---------- cta band ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--navy)}
.cta-band::before{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(239,95,16,.42),rgba(28,32,39,.2));opacity:.9}
.cta-band::after{content:"";position:absolute;right:-100px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(247,162,59,.20),transparent 70%)}
.cta-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:44px;padding:80px 0 40px;flex-wrap:wrap}
.cta-eyebrow{display:block;color:rgba(255,255,255,.85);font-size:13px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;margin-bottom:14px}
.cta-copy h2{color:#fff;font-size:clamp(26px,3.4vw,40px);letter-spacing:-.02em;line-height:1.22}
.cta-copy p{color:rgba(255,255,255,.88);margin-top:16px;font-size:clamp(15px,1.3vw,17px);line-height:1.65;max-width:540px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex-shrink:0}
.cta-contact{position:relative;z-index:1;display:flex;gap:16px;justify-content:center;flex-wrap:wrap;padding:34px 0 84px;border-top:1px solid rgba(255,255,255,.15)}
.cta-chip{display:inline-flex;align-items:center;gap:13px;padding:14px 22px;border-radius:16px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);color:#fff;transition:background .18s,border-color .18s,transform .18s}
.cta-chip:hover{background:rgba(255,255,255,.15);border-color:rgba(255,255,255,.45);transform:translateY(-3px)}
.cta-chip-ico{display:grid;place-items:center;flex-shrink:0;width:42px;height:42px;border-radius:50%;background:rgba(255,255,255,.16);font-size:18px}
.cta-chip-txt{display:flex;flex-direction:column;line-height:1.3;text-align:left}
.cta-chip-label{font-size:12px;color:rgba(255,255,255,.72);font-weight:600;margin-bottom:2px}
.cta-chip-txt b{font-size:15px;color:#fff;font-weight:700;letter-spacing:.01em}

/* ---------- footer ---------- */
.site-footer{background:#16181d;color:#c3c7d0;padding-top:60px}
.footer-top{display:grid;grid-template-columns:1.4fr 2fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-word{margin-bottom:16px}
.footer-word .brand-txt b{color:#fff}
.footer-word .brand-txt i{color:#9aa0ac}
.footer-desc{font-size:14px;color:#9aa0ac;max-width:340px;line-height:1.7}
.social{display:flex;gap:10px;margin-top:18px}
.soc{width:36px;height:36px;border-radius:9px;display:grid;place-items:center;background:rgba(255,255,255,.08);color:#fff;font-weight:800;font-size:14px;font-family:Arial,sans-serif;transition:background .2s}
.soc:hover{background:var(--primary)}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:14px}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:#9aa0ac;transition:color .2s}
.footer-col a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;padding-block:26px}
.footer-corp{font-size:13px;color:#868b98;line-height:1.7}
.footer-copy{font-size:13px;color:#6f7482}
.footer-note{max-width:var(--container);margin:0 auto;padding:0 var(--gutter) 30px;font-size:12px;color:#6f7482;line-height:1.6}

/* ---------- to-top ---------- */
.to-top{position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;background:var(--navy);color:#fff;font-size:20px;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .25s,transform .25s,visibility .25s,background .2s;z-index:90}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--primary)}

/* ---------- reveal animation ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;max-width:920px}
  .ht{display:none}
  .engine-grid{grid-template-columns:1fr}
  .spec-grid{grid-template-columns:repeat(2,1fr)}
  .collab-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr}
}
@media (max-width:768px){
  .section{padding:66px 0}
  .nav{display:none}
  .nav-toggle{display:flex}
  .nav.is-open{display:block;position:absolute;top:70px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow);padding:10px 0}
  .nav.is-open .nav-list{flex-direction:column;gap:0;padding:0 var(--gutter)}
  .nav.is-open .nav-list li{border-bottom:1px solid var(--line-2)}
  .nav.is-open .nav-list a{display:block;padding:15px 0}
  .nav.is-open .nav-list a::after{display:none}
  .store-grid{grid-template-columns:1fr;max-width:520px}
  .cta-contact{gap:12px;padding:30px 0 56px}
  .cta-inner{flex-direction:column;text-align:center;align-items:center;padding:56px 0 34px}
  .cta-copy p{margin-inline:auto}
  .footer-bottom{flex-direction:column}
  .trust-inner{grid-template-columns:repeat(2,1fr);gap:26px}
  .trust-item:nth-child(3),.trust-item:nth-child(1){border-left:0}
}
@media (max-width:560px){
  :root{--gutter:22px}
  .mo-br{display:inline}
  .section-head.center .section-title,.hero-title{align-self:stretch}
  .spec-grid{grid-template-columns:1fr;max-width:400px;margin-inline:auto}
  .trust-inner{grid-template-columns:1fr}
  .trust-item+.trust-item{border-left:0;border-top:1px solid var(--line);padding-top:24px}
  .hero-cta .btn{flex:1}
  .cta-chip{width:100%;max-width:340px}
  .store-card{flex-direction:column;text-align:center;align-items:center}
  .store-cta{justify-content:center}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none;transition:none}
}