:root{
  --bg:#060B16;--bg-2:#0A1424;--panel:#0D1B2E;--line:rgba(56,189,248,.16);
  --cyan:#38BDF8;--cyan-2:#22D3EE;--text:#E6F1FF;--muted:#8FA3BF;
  --font:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.7;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.grad{background:linear-gradient(90deg,var(--cyan),var(--cyan-2));-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- 导航 ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .3s,border-color .3s;border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(6,11,22,.88);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom-color:var(--line)}
.nav-inner{display:flex;align-items:center;gap:36px;height:72px}
.nav-logo img{height:38px}
.nav-menu{display:flex;gap:28px;margin-left:auto}
.nav-menu a{color:var(--muted);font-size:15px;transition:color .2s}
.nav-menu a:hover{color:var(--text)}
.nav-phone{border:1px solid var(--cyan);color:var(--cyan);border-radius:999px;padding:7px 18px;font-size:14px;font-weight:600;letter-spacing:.5px;transition:background .2s,color .2s}
.nav-phone:hover{background:var(--cyan);color:#04121F}
.nav-burger{display:none;background:none;border:none;cursor:pointer;padding:8px}
.nav-burger span{display:block;width:22px;height:2px;background:var(--text);margin:5px 0;border-radius:2px}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:92vh;display:flex;flex-direction:column;justify-content:center;padding:120px 0 64px}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.35;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:linear-gradient(#000 40%,transparent);mask-image:linear-gradient(#000 40%,transparent)}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse at 70% 20%,rgba(56,189,248,.14),transparent 55%)}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.hero-eyebrow{color:var(--cyan);letter-spacing:3px;font-size:13px;margin-bottom:16px}
.hero h1{font-size:clamp(34px,5vw,58px);line-height:1.25;font-weight:800}
.hero-sub{margin-top:18px;font-size:clamp(15px,1.6vw,19px);color:var(--text);letter-spacing:1px}
.hero-desc{margin-top:12px;color:var(--muted);max-width:480px}
.hero-cta{margin-top:32px;display:flex;gap:16px;flex-wrap:wrap}
.hero-visual img{border-radius:16px;box-shadow:0 0 80px rgba(56,189,248,.15);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 12%);mask-image:linear-gradient(90deg,transparent,#000 12%)}

/* ---------- 按钮 ---------- */
.btn{display:inline-block;border-radius:999px;padding:12px 28px;font-size:15px;font-weight:600;transition:transform .2s,box-shadow .2s,background .2s,color .2s}
.btn-primary{background:linear-gradient(90deg,var(--cyan),var(--cyan-2));color:#04121F;font-weight:700}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(56,189,248,.35)}
.btn-ghost{border:1px solid var(--cyan);color:var(--cyan)}
.btn-ghost:hover{background:rgba(56,189,248,.12)}
.btn-lg{padding:15px 44px;font-size:17px}

/* ---------- 数据条 ---------- */
.stats{position:relative;z-index:1;display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:64px}
.stat{border:1px solid var(--line);background:rgba(13,27,46,.5);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  border-radius:14px;padding:20px 24px;text-align:center}
.stat strong{display:block;font-size:26px;color:var(--cyan);font-weight:800}
.stat span{color:var(--muted);font-size:13px}

/* ---------- Section 通用 ---------- */
.section{padding:96px 0}
.section-alt{background:var(--bg-2)}
.sec-eyebrow{color:var(--cyan);letter-spacing:4px;font-size:12px}
.sec-title{font-size:clamp(26px,3.4vw,40px);margin:8px 0 12px;font-weight:800}
.sec-desc{color:var(--muted);max-width:640px;margin-bottom:44px}

/* ---------- 卡片 ---------- */
.cards{display:grid;gap:20px}
.cards-2{grid-template-columns:repeat(2,1fr)}
.cards-3{grid-template-columns:repeat(3,1fr)}
.cards-5{grid-template-columns:repeat(5,1fr)}
.card,.sol-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:26px;transition:transform .25s,border-color .25s}
.card:hover,.sol-card:hover{transform:translateY(-4px);border-color:rgba(56,189,248,.45)}
.card h3,.sol-card h3{font-size:18px;margin-bottom:10px;display:flex;align-items:center}
.card h3::before,.sol-card h3::before{content:"";display:inline-block;width:10px;height:10px;border-radius:3px;
  background:linear-gradient(135deg,var(--cyan),var(--cyan-2));margin-right:10px;flex:none}
.card p{color:var(--muted);font-size:14.5px}
.sol-card ul{list-style:none;color:var(--muted);font-size:14px}
.sol-card li{padding:3px 0}
.sol-card li::before{content:"▸ ";color:var(--cyan)}

/* ---------- 产品媒体区 ---------- */
.product-media{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-top:56px;align-items:stretch}
.video-box{min-width:0}
.video-box video{width:100%;border-radius:14px;border:1px solid var(--line);display:block}
.media-cap{color:var(--muted);font-size:13px;margin-top:10px;text-align:center}
.spec-panel{display:flex;flex-direction:column;min-width:0;border:1px solid var(--line);border-radius:14px;padding:28px;background:linear-gradient(180deg,rgba(13,27,46,.86),rgba(13,27,46,.52))}
.spec-panel-head{margin-bottom:18px}
.spec-title-row{display:flex;align-items:center;gap:12px}
.spec-panel h3{font-size:22px;line-height:1.35}
.spec-summary{width:100%;border-collapse:collapse;font-size:14px}
.spec-summary td{padding:12px 10px;border-bottom:1px solid var(--line)}
.spec-summary td:nth-child(odd){color:var(--muted);white-space:nowrap}
.spec-summary td:nth-child(even){color:var(--text);font-weight:700}
.spec-toggle{border:0;background:transparent;color:var(--cyan);cursor:pointer;font-size:13px;font-weight:700;line-height:1;padding:4px 0;transition:color .2s,transform .2s}
.spec-toggle:hover{color:var(--cyan-2);transform:translateX(2px)}
.spec-box{min-width:0;overflow-x:auto}
.spec-box-full{margin-top:28px;border:1px solid var(--line);border-radius:14px;padding:24px;background:rgba(13,27,46,.45)}
.spec-box-full[hidden]{display:none}
.spec-head{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:14px}
.spec-head h3{font-size:20px}
.spec-head p{color:var(--muted);font-size:12px}
.spec-table{width:100%;min-width:760px;border-collapse:collapse;font-size:13px}
.spec-table th,.spec-table td{padding:8px 10px;border:1px solid var(--line)}
.spec-table th{color:var(--text);font-weight:700;background:rgba(56,189,248,.08)}
.spec-table td:nth-child(2){color:var(--muted);white-space:nowrap}
.spec-table td:nth-child(3){color:var(--text)}
.spec-table .spec-category{width:82px;color:var(--text);font-weight:700;text-align:center;vertical-align:middle;background:rgba(56,189,248,.05);white-space:normal}
.spec-photo{border-radius:12px}

/* ---------- 场景实拍条 ---------- */
.scene-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:44px}
.scene-strip figure{position:relative;border-radius:14px;overflow:hidden;border:1px solid var(--line)}
.scene-strip img{width:100%;aspect-ratio:16/10;object-fit:cover}
.scene-strip figcaption{position:absolute;left:0;right:0;bottom:0;padding:10px 16px;font-size:13px;
  background:linear-gradient(transparent,rgba(6,11,22,.85));color:var(--text)}

/* ---------- 二次开发流程 ---------- */
.flow{margin-top:52px;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;list-style:none;counter-reset:step}
.flow li{position:relative;counter-increment:step;padding:22px 20px;background:var(--panel);border:1px solid var(--line);border-radius:14px}
.flow li::before{content:"0" counter(step);display:block;font-size:26px;font-weight:800;color:var(--cyan);margin-bottom:8px;opacity:.9}
.flow strong{display:block;font-size:16px;margin-bottom:4px}
.flow span{color:var(--muted);font-size:13px}

/* ---------- 关于 / 联系 ---------- */
.about-text{max-width:760px;color:var(--muted);font-size:17px}
.section-contact{position:relative;text-align:center;overflow:hidden}
.section-contact::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse at 50% 0%,rgba(56,189,248,.16),transparent 60%)}
.contact-inner{position:relative}
.contact-inner .sec-desc{margin:0 auto 8px}
.contact-phone{display:block;font-size:clamp(28px,4vw,44px);font-weight:800;color:var(--text);margin:18px 0 28px;transition:color .2s}
.contact-phone:hover{color:var(--cyan)}

/* ---------- 页脚 ---------- */
.footer{border-top:1px solid var(--line);padding:40px 0;color:var(--muted);font-size:13px;text-align:center}
.footer-logo{height:30px;margin:0 auto 14px}
.footer-copy{margin-top:6px;opacity:.75}

/* ---------- 渐入动画 ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.on{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .nav-menu{position:fixed;top:72px;left:0;right:0;flex-direction:column;gap:0;background:var(--bg-2);
    border-bottom:1px solid var(--line);padding:8px 0;transform:translateY(-130%);transition:transform .3s;z-index:-1}
  .nav-menu.open{transform:translateY(0)}
  .nav-menu a{padding:14px 24px}
  .nav-phone{margin-left:auto}
  .nav-burger{display:block}
  .hero-inner{grid-template-columns:1fr}
  .hero-visual{max-width:420px;margin:0 auto}
  .cards-3,.cards-5{grid-template-columns:repeat(2,1fr)}
  .product-media{grid-template-columns:1fr}
}
@media (max-width:768px){
  .section{padding:72px 0}
  .stats{grid-template-columns:repeat(2,1fr)}
  .spec-panel{padding:22px}
  .spec-summary tr{display:grid;grid-template-columns:minmax(76px,.75fr) 1fr}
  .spec-summary td{padding:10px 8px}
  .spec-head{display:block}
  .spec-head p{margin-top:4px}
  .scene-strip{grid-template-columns:1fr}
  .flow{grid-template-columns:repeat(2,1fr)}
  .cards-2{grid-template-columns:1fr}
}
@media (max-width:480px){
  .cards-3,.cards-5{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr}
  .hero{padding-top:100px}
  .hero-eyebrow{font-size:11px;letter-spacing:2px}
}

/* ---------- 导航下拉 ---------- */
.nav-drop{position:relative}
.nav-drop-toggle{background:none;border:none;cursor:pointer;font:inherit;font-size:15px;color:var(--muted);padding:0;display:inline-flex;align-items:center;gap:7px;transition:color .2s}
.nav-drop-toggle::after{content:"";width:6px;height:6px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-2px)}
.nav-drop:hover .nav-drop-toggle,.nav-drop.open .nav-drop-toggle{color:var(--text)}
.nav-drop-menu{position:absolute;top:calc(100% + 16px);left:50%;transform:translateX(-50%) translateY(-6px);min-width:212px;
  background:rgba(10,20,36,.97);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid var(--line);border-radius:12px;padding:8px;display:flex;flex-direction:column;
  opacity:0;visibility:hidden;transition:opacity .2s,transform .2s,visibility .2s}
.nav-drop-menu::before{content:"";position:absolute;left:0;right:0;top:-16px;height:16px}
.nav-drop:hover .nav-drop-menu,.nav-drop:focus-within .nav-drop-menu,.nav-drop.open .nav-drop-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.nav-drop-menu a{padding:10px 14px;border-radius:8px;font-size:14.5px;color:var(--muted);white-space:nowrap;transition:background .2s,color .2s}
.nav-drop-menu a:hover{background:rgba(56,189,248,.12);color:var(--text)}

/* ---------- 子页入口卡片 ---------- */
.entry-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.entry-card{display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:transform .25s,border-color .25s}
.entry-card:hover{transform:translateY(-4px);border-color:rgba(56,189,248,.45)}
.entry-card img{width:100%;aspect-ratio:16/10;object-fit:cover;object-position:center 28%}
.entry-card img.entry-img-top{object-position:center 10%}
.entry-card img.entry-img-mid{object-position:center 34%}
.entry-body{display:flex;flex-direction:column;flex:1;padding:22px 24px 26px}
.entry-body h3{font-size:19px;margin-bottom:10px}
.entry-body p{color:var(--muted);font-size:14.5px;flex:1}
.entry-more{margin-top:18px;color:var(--cyan);font-size:14px;font-weight:700}
.entry-more::after{content:" →"}
.inline-link{color:var(--cyan);font-weight:600}
.inline-link:hover{text-decoration:underline}

/* ---------- 子页头部与面包屑 ---------- */
.crumb{padding-top:100px;color:var(--muted);font-size:13px}
.crumb a{color:var(--muted);transition:color .2s}
.crumb a:hover{color:var(--cyan)}
.crumb i{font-style:normal;margin:0 8px;opacity:.45}
.page-hero{position:relative;padding:26px 0 72px;overflow:hidden}
.page-hero::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse at 75% 15%,rgba(56,189,248,.13),transparent 58%)}
.page-hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.page-hero h1{font-size:clamp(27px,3.9vw,44px);line-height:1.3;font-weight:800}
.page-lead{margin-top:18px;color:var(--muted);font-size:16.5px;max-width:580px}
.page-hero-visual img{border-radius:16px;border:1px solid var(--line);box-shadow:0 0 60px rgba(56,189,248,.12)}
.tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.tag{border:1px solid var(--line);background:rgba(13,27,46,.6);color:var(--muted);border-radius:999px;padding:6px 16px;font-size:13.5px}

/* ---------- 图文分栏 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;margin-top:48px}
.split-media img{border-radius:14px;border:1px solid var(--line)}
.split h3{font-size:21px;margin-bottom:14px}
.split-list{list-style:none;color:var(--muted);font-size:15px}
.split-list li{position:relative;padding:6px 0 6px 20px}
.split-list li::before{content:"▸";position:absolute;left:0;color:var(--cyan)}

/* ---------- 算法表 ---------- */
.algo-table{width:100%;min-width:720px;border-collapse:collapse;font-size:13.5px}
.algo-table th,.algo-table td{padding:9px 12px;border:1px solid var(--line);text-align:left;vertical-align:middle}
.algo-table th{color:var(--text);font-weight:700;background:rgba(56,189,248,.08)}
.algo-table td{color:var(--muted)}
.algo-table .algo-name{color:var(--text);font-weight:600}
.algo-table .algo-cat{width:88px;color:var(--text);font-weight:700;text-align:center;background:rgba(56,189,248,.05)}
.algo-table .algo-mode{width:96px;text-align:center;white-space:nowrap;color:var(--cyan);font-size:12.5px}

/* ---------- 页脚内链 ---------- */
.footer-links{display:flex;justify-content:center;flex-wrap:wrap;gap:8px 24px;margin-bottom:16px}
.footer-links a{color:var(--muted);transition:color .2s}
.footer-links a:hover{color:var(--cyan)}
.footer-copy a{transition:color .2s}
.footer-copy a:hover{color:var(--cyan)}

/* ---------- 新增组件响应式 ---------- */
@media (max-width:1024px){
  /* 移动端：下拉标题降为不可点的分组标签，保住"产品/能力"两层结构 */
  .nav-drop{width:100%}
  .nav-drop-toggle{display:block;width:100%;text-align:left;cursor:default;pointer-events:none;
    padding:16px 24px 6px;font-size:12px;letter-spacing:2px;color:var(--cyan);opacity:.85}
  .nav-drop-toggle::after{display:none}
  .nav-drop-menu{position:static;transform:none;opacity:1;visibility:visible;min-width:0;padding:0;
    background:none;backdrop-filter:none;-webkit-backdrop-filter:none;border:0;border-radius:0}
  .nav-drop-menu::before{display:none}
  .nav-drop-menu a{padding:12px 24px 12px 36px;border-radius:0}
  .entry-cards{grid-template-columns:repeat(2,1fr)}
  .page-hero-inner{grid-template-columns:1fr}
  .page-hero-visual{max-width:420px;margin:0 auto}
  .split{grid-template-columns:1fr;gap:28px}
}
@media (max-width:768px){
  .entry-cards{grid-template-columns:1fr}
  .crumb{padding-top:92px}
  .page-hero{padding-bottom:56px}
}

/* ---------- 六步流程 ---------- */
.flow-6{grid-template-columns:repeat(3,1fr)}
@media (max-width:768px){.flow-6{grid-template-columns:repeat(2,1fr)}}
@media (max-width:480px){.flow-6{grid-template-columns:1fr}}

/* ---------- 产品与方案：两栏入口卡 ---------- */
.entry-cards-2{grid-template-columns:repeat(2,1fr)}
.entry-note{display:block;margin-top:10px;color:var(--cyan);font-size:13.5px;font-weight:600}

/* ---------- 技术能力大区 ---------- */
.cap-block{padding-top:48px;margin-top:48px;border-top:1px solid var(--line)}
.cap-block:first-of-type{padding-top:8px;margin-top:8px;border-top:0}
.cap-title{font-size:23px;font-weight:800;margin-bottom:12px}
.cap-desc{color:var(--muted);max-width:640px;margin-bottom:22px}
.cap-block .sec-desc{margin-bottom:28px}
.cap-block .split{margin-top:0}
.cap-block .split-media a{display:block}

@media (max-width:768px){
  .entry-cards-2{grid-template-columns:1fr}
  .cap-block{padding-top:36px;margin-top:36px}
}

/* ---------- 交付前提清单 ---------- */
.prereq{margin-top:44px;border:1px solid var(--line);border-radius:14px;padding:28px 30px;background:rgba(13,27,46,.45)}
.prereq h3{font-size:19px;margin-bottom:12px}
.prereq-list{columns:2;column-gap:40px}
.prereq-list li{break-inside:avoid}
.prereq-note{color:var(--muted);font-size:13.5px;margin-top:16px;opacity:.85}
@media (max-width:768px){.prereq-list{columns:1}.prereq{padding:22px}}

/* ---------- 关于我们（公司级内容） ---------- */
#about .about-text{max-width:820px;margin-bottom:16px}
#about .flow{margin-top:40px}
.about-note{margin-top:34px;color:var(--cyan);font-size:15px;letter-spacing:1px;font-weight:600;opacity:.9}
@media (max-width:768px){.about-note{font-size:14px;letter-spacing:0}}