/* 京宏科技官网 main.css —— 深色科技风 · 560/768 两档断点 */
:root{
  --bg:#0A0E1A; --bg2:#0E1424; --bg3:#121A2E;
  --line:rgba(255,255,255,.08); --line2:rgba(255,255,255,.14);
  --txt:#E7ECF6; --txt2:#9AA6BF; --txt3:#66718C;
  --grad:linear-gradient(135deg,#4F7CFF 0%,#8B5CF6 100%);
  --cyan:#22D3EE; --blue:#4F7CFF; --violet:#8B5CF6;
  --radius:16px; --maxw:1200px;
  --mono:"JetBrains Mono","SFMono-Regular",Consolas,"Courier New",monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--txt);font-family:"HarmonyOS Sans SC","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono)}

/* ===== 占位框 ===== */
.ph{position:relative;width:100%;border-radius:12px;border:1px dashed var(--line2);
  background:linear-gradient(135deg,rgba(79,124,255,.14),rgba(139,92,246,.14));
  display:flex;align-items:center;justify-content:center;color:var(--txt3);
  font-size:13px;letter-spacing:.2em;overflow:hidden}
.ph::after{content:attr(data-w) "×" attr(data-h);position:absolute;right:8px;bottom:6px;
  font-family:var(--mono);font-size:10px;color:var(--txt3);opacity:.7}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:999px;
  font-size:15px;font-weight:600;cursor:pointer;border:none;transition:.25s;white-space:nowrap}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 6px 24px rgba(79,124,255,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 32px rgba(139,92,246,.45)}
.btn-ghost{background:transparent;color:var(--txt);border:1px solid var(--line2)}
.btn-ghost:hover{border-color:var(--blue);color:#fff}
.btn-console{background:transparent;color:#fff;border:1px solid transparent;
  background-image:linear-gradient(var(--bg2),var(--bg2)),var(--grad);
  background-origin:border-box;background-clip:padding-box,border-box;
  border:1px solid transparent;padding:8px 20px;border-radius:999px;font-size:13.5px;font-weight:600}
.btn-console:hover{background-image:var(--grad),var(--grad)}

/* ===== 导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;height:64px;
  background:rgba(10,14,26,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-in{max-width:var(--maxw);margin:0 auto;height:64px;padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;gap:16px}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800}
.nav-logo .dot{width:26px;height:26px;border-radius:8px;background:var(--grad);
  display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:13px;font-weight:900}
.nav-links{display:flex;align-items:center;gap:30px;font-size:16px;color:var(--txt2)}
.nav-links a{transition:.2s;white-space:nowrap}
.nav-links a:hover,.nav-links a.active{color:#fff}
.nav-links a.active{position:relative}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;background:var(--grad);border-radius:2px}
.nav-burger{display:none;background:none;border:none;color:var(--txt);font-size:22px;cursor:pointer;line-height:1}
.nav-mobile{display:none}

/* ===== Hero ===== */
.hero{position:relative;min-height:92vh;display:flex;flex-direction:column;justify-content:center;
  padding:120px 0 0;overflow:hidden}
.kh-video-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0;opacity:.92}
.hero-mask{position:absolute;inset:0;z-index:2;
  background:linear-gradient(180deg,rgba(10,14,26,.72) 0%,rgba(10,14,26,.55) 45%,var(--bg) 100%)}
.hero-in{position:relative;z-index:3;text-align:center;max-width:880px;margin:0 auto;padding:0 24px}
.hero-kicker{display:inline-block;padding:6px 16px;border-radius:999px;border:1px solid var(--line2);
  background:rgba(255,255,255,.06);font-size:13px;color:var(--txt2);font-family:var(--mono);margin-bottom:22px}
.hero h1{font-size:clamp(30px,5vw,56px);line-height:1.25;font-weight:900;letter-spacing:.01em}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{margin:18px auto 34px;max-width:640px;color:var(--txt2);font-size:clamp(14px,1.6vw,17px)}
.hero-ctas{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* logo 滚动横幅 */
.logo-strip{position:relative;z-index:3;margin-top:72px;border-top:1px solid var(--line);
  padding:18px 0;background:rgba(10,14,26,.6);overflow:hidden;max-width:100%}
.logo-track{display:flex;gap:56px;width:max-content;animation:logoscroll 28s linear infinite;
  align-items:center;color:var(--txt3);font-family:var(--mono);font-size:13px;letter-spacing:.12em}
.logo-item{display:flex;align-items:center;gap:10px;white-space:nowrap}
.logo-item img{height:22px;width:auto;display:block;filter:none;opacity:1;transition:filter .25s,opacity .25s}
.logo-item:hover img{filter:none;opacity:1}
.logo-item span{font-size:13px;color:#aab4c8;opacity:.75;transition:opacity .25s}
.logo-item:hover span{opacity:1}
@keyframes logoscroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ===== 通用区块 ===== */
section.sec{padding:88px 0}
.sec-kicker{display:inline-flex;align-items:center;gap:14px;font-family:var(--mono);font-size:14px;letter-spacing:.28em;
  color:var(--cyan);text-transform:uppercase;margin-bottom:16px;font-weight:600}
.sec-kicker::before,.sec-kicker::after{content:"";display:inline-block;width:36px;height:1px;
  background:linear-gradient(90deg,transparent,var(--cyan));opacity:.8}
.sec-kicker::after{background:linear-gradient(90deg,var(--cyan),transparent)}
.sec h2{font-size:clamp(24px,3.4vw,38px);font-weight:800;line-height:1.35}
.sec-head{max-width:720px;margin-bottom:48px}
.sec-head p{color:var(--txt2);margin-top:14px}

/* ===== 三大能力卡 ===== */
.caps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cap-card{background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;transition:.3s}
.cap-card:hover{border-color:rgba(79,124,255,.5);transform:translateY(-4px);
  box-shadow:0 16px 40px rgba(0,0,0,.4)}
.cap-media{position:relative;aspect-ratio:16/10;overflow:hidden}
.cap-media video,.cap-media img{width:100%;height:100%;object-fit:cover}
.cap-body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:10px;flex:1}
.cap-body h3{font-size:18px;font-weight:700}
.cap-body p{color:var(--txt2);font-size:14px;flex:1}
.cap-link{color:var(--cyan);font-size:14px;font-weight:600}
.cap-price{font-family:var(--mono);font-size:12.5px;color:var(--txt3);border-top:1px dashed var(--line);padding-top:10px}

/* ===== 数据带 ===== */
.stats{background:linear-gradient(180deg,var(--bg2),var(--bg));border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);padding:56px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat .num{font-family:var(--mono);font-size:clamp(28px,3.4vw,44px);font-weight:800;color:var(--cyan)}
.stat .lbl{color:var(--txt2);font-size:13.5px;margin-top:6px}

/* ===== 旗舰案例 ===== */
.case-split{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden}
.case-side{padding:36px 34px}
.case-pain{background:rgba(255,77,109,.05);border-right:1px solid var(--line)}
.case-win{background:rgba(79,124,255,.06)}
.case-side h3{font-size:16px;margin-bottom:18px;display:flex;align-items:center;gap:8px}
.case-side ul{list-style:none;display:flex;flex-direction:column;gap:12px}
.case-side li{color:var(--txt2);font-size:14px;padding-left:22px;position:relative}
.case-pain li::before{content:"✕";position:absolute;left:0;color:#FF4D6D;font-size:12px}
.case-win li::before{content:"✓";position:absolute;left:0;color:var(--cyan);font-size:13px}
.case-media{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:36px 0}
.case-cta{text-align:center;margin-top:8px}

/* ===== 行业延展 ===== */
.inds{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.ind{display:flex;align-items:center;gap:10px;padding:14px 26px;border-radius:999px;
  border:1px solid var(--line);background:var(--bg2);font-size:14px;color:var(--txt2)}
.ind b{color:var(--txt)}
.ind .ok{color:var(--cyan);font-family:var(--mono);font-size:12px}

/* ===== 关于摘要 ===== */
.about-brief{display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
.about-brief p{color:var(--txt2);font-size:15px}
.about-brief .ph{aspect-ratio:4/3}
.cred-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}
.cred{font-family:var(--mono);font-size:11.5px;color:var(--txt3);border:1px dashed var(--line2);
  border-radius:8px;padding:5px 12px}

/* ===== 联系 CTA ===== */
.kh-cta{background:radial-gradient(1200px 500px at 50% -10%,rgba(79,124,255,.18),transparent 60%),var(--bg2);
  border-top:1px solid var(--line);padding:88px 0}
.kh-cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.kh-cta-sub{color:var(--txt2);margin:12px 0 20px}
.kh-cta-mail{display:inline-flex;align-items:center;gap:10px;color:var(--cyan);
  font-family:var(--mono);font-size:14px;margin-bottom:24px}
.kh-cta-qr img{width:148px;height:148px;border-radius:12px;border:1px solid var(--line2)}
.kh-cta-qr p{font-size:12.5px;color:var(--txt3);margin-top:8px}
.kh-cta-form{background:var(--bg3);border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px}
.kh-cta-form h3{font-size:18px;margin-bottom:20px}
.kh-field{margin-bottom:16px}
.kh-field label{display:block;font-size:13px;color:var(--txt2);margin-bottom:6px}
.kh-field label i{color:#FF4D6D;font-style:normal}
.kh-field input,.kh-field textarea{width:100%;background:var(--bg);border:1px solid var(--line2);
  border-radius:10px;color:var(--txt);padding:11px 14px;font-size:14px;font-family:inherit;resize:vertical}
.kh-field input:focus,.kh-field textarea:focus{outline:none;border-color:var(--blue)}
.kh-cta-note{font-size:12.5px;color:var(--txt3);margin-top:12px}
.form-ok{color:var(--cyan)!important}

/* ===== 页脚 ===== */
footer{border-top:1px solid var(--line);background:var(--bg);padding:56px 0 28px}
.kh-footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;margin-bottom:36px}
.kh-footer-brand .nav-logo{margin-bottom:12px}
.kh-footer-brand p{color:var(--txt3);font-size:13.5px}
.kh-footer-col h4{font-size:13px;letter-spacing:.18em;color:var(--txt3);margin-bottom:14px;font-weight:600}
.kh-footer-col a{display:block;color:var(--txt2);font-size:14px;padding:5px 0;transition:.2s}
.kh-footer-col a:hover{color:#fff}
.kh-footer-bottom{border-top:1px solid var(--line);padding-top:20px;display:flex;
  justify-content:space-between;gap:12px;flex-wrap:wrap;color:var(--txt3);font-size:12.5px}

/* ===== About 页 ===== */
.page-hero{padding:150px 0 60px;text-align:center}
.page-hero h1{font-size:clamp(28px,4vw,44px);font-weight:900}
.page-hero p{color:var(--txt2);max-width:640px;margin:16px auto 0}
.timeline{position:relative;max-width:760px;margin:0 auto;padding-left:32px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:var(--grad);opacity:.5}
.tl-item{position:relative;padding:0 0 40px 24px}
.tl-item::before{content:"";position:absolute;left:-31px;top:6px;width:14px;height:14px;border-radius:50%;
  background:var(--bg);border:3px solid var(--blue)}
.tl-date{font-family:var(--mono);font-size:13px;color:var(--cyan)}
.tl-item h3{font-size:18px;margin:6px 0 8px}
.tl-item p{color:var(--txt2);font-size:14.5px}
.cred-wall{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cred-wall .ph{aspect-ratio:3/4}
.contact-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.contact-card{background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;text-align:center}
.contact-card h4{font-size:15px;margin-bottom:8px}
.contact-card p{color:var(--txt2);font-size:13.5px;font-family:var(--mono)}

/* ===== 滚动渐入 ===== */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease;transition-delay:var(--d,0s)}
.reveal.in{opacity:1;transform:none}

/* ===== 断点：768 ===== */
@media (max-width:768px){
  .nav-links,.nav .btn-console{display:none}
  .nav-burger{display:block}
  .nav-mobile{position:fixed;top:64px;left:0;right:0;z-index:99;background:rgba(10,14,26,.97);
    border-bottom:1px solid var(--line);padding:12px 24px 20px;display:none;flex-direction:column;gap:4px}
  .nav-mobile.open{display:flex}
  .nav-mobile a{padding:13px 4px;font-size:17px;color:var(--txt2);border-bottom:1px solid var(--line)}
  .nav-mobile a:last-child{border:none}
  .nav-mobile .btn-console{margin-top:10px;text-align:center}
  section.sec{padding:64px 0}
  .caps,.stats-grid{grid-template-columns:1fr 1fr}
  .case-split,.case-media{grid-template-columns:1fr}
  .case-pain{border-right:none;border-bottom:1px solid var(--line)}
  .about-brief,.kh-cta-grid{grid-template-columns:1fr}
  .kh-footer-grid{grid-template-columns:1fr;gap:28px}
  .cred-wall{grid-template-columns:1fr 1fr}
  .contact-cards{grid-template-columns:1fr}
  .hero{min-height:86vh}
}
/* ===== 断点：560 ===== */
@media (max-width:560px){
  .wrap,.nav-in{padding:0 16px}
  .caps,.stats-grid{grid-template-columns:1fr}
  .stats-grid{gap:32px}
  .hero-ctas .btn{width:100%;justify-content:center}
  .kh-cta-form{padding:24px 18px}
  .case-side{padding:26px 20px}
  .cred-wall{grid-template-columns:1fr}
  .logo-track{gap:36px}
}

/* M1配图 */
.card-media{width:100%;height:100%;object-fit:cover;display:block;border-radius:12px 12px 0 0;}
@media(max-width:768px){.card-media{border-radius:10px 10px 0 0;}}

/* 模型矩阵区 */
.model-groups{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:8px}
.mg{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:20px}
.mg h4{font-size:15px;color:#fff;margin-bottom:14px}
.mg-chips{display:flex;flex-wrap:wrap;gap:8px}
.mg-chips span{font-size:12.5px;padding:6px 12px;border-radius:999px;background:rgba(79,124,255,.12);border:1px solid rgba(79,124,255,.25);color:#cdd8ff;white-space:nowrap}
.mg-chips span:last-child{background:rgba(34,211,238,.1);border-color:rgba(34,211,238,.3);color:#7ee7f5}
@media(max-width:768px){.model-groups{grid-template-columns:1fr}}

/* 模型徽章 */
.mg-chips span{display:inline-flex;align-items:center;gap:7px}
.lg{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:6px;background:var(--c);color:#fff;font-size:11.5px;font-weight:700;font-style:normal;flex:0 0 22px;box-shadow:0 0 0 1px rgba(255,255,255,.15) inset}
.lgi{width:26px;height:26px;object-fit:contain;border-radius:6px;background:rgba(255,255,255,.95);padding:4px;box-sizing:border-box;flex:0 0 26px;display:inline-block}
.lgi.inv{background:#141a2b;padding:6px}
.h-ic{width:20px;height:20px;vertical-align:-4px;margin-right:7px;color:var(--cyan,#22d3ee)}

/* brand logo */
.nav-logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:.5px}
.nav-logo-img{height:36px;width:auto;display:block;border-radius:9px;box-shadow:0 0 0 1px rgba(122,146,255,.22),0 4px 18px rgba(79,124,255,.18)}