/* 雷达量方智能管理系统 - 企业官网样式 */
/* ============ 基础 ============ */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:#fff;color:#151a24;overflow-x:hidden;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  -webkit-font-smoothing:antialiased;line-height:1.6}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
h1,h2,h3,p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid #4d8bff;outline-offset:3px}
:root{
  --navy:#08185e; --navy2:#0d2a94; --blue:#1457f5; --blue-l:#3b7bff;
  --cyan:#189b95; --violet:#3b2fc4; --ink:#151a24; --muted:#6b7484;
  --line:#e7ebf2; --card:#f3f6fb;
}
.wrap{width:min(1200px,calc(100% - 48px));margin-inline:auto}
section[id]{scroll-margin-top:76px}
.section{padding:88px 0;position:relative}
.sec-head{position:relative;padding-left:24px;margin-bottom:42px}
.sec-head::before{content:"";position:absolute;left:0;top:2px;bottom:2px;width:3px;background:var(--violet);border-radius:3px}
.sec-head h2{font-size:34px;line-height:1.35;font-weight:700;letter-spacing:.5px;color:var(--ink)}
.sec-head p{margin-top:12px;font-size:14px;color:var(--muted);letter-spacing:.2px}
.sec-head--light h2{color:#fff}
.sec-head--light p{color:#a8bce9}
.sec-head--light::before{background:#6b8bff}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.icon{width:24px;height:24px;display:block;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:none}

/* 滚动淡入（无 JS 时内容始终可见） */
.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .75s ease,transform .75s cubic-bezier(.2,.7,.2,1)}
.js .reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.js .reveal{opacity:1;transform:none;transition:none}}

/* ============ 导航 ============ */
.nav{position:fixed;inset:0 0 auto 0;z-index:100;height:76px;background:transparent;transition:background .3s,box-shadow .3s}
.nav.is-solid{background:rgba(6,20,76,.94);box-shadow:0 6px 24px rgba(3,12,48,.22);backdrop-filter:blur(10px)}
.nav__inner{height:100%;display:flex;align-items:center;gap:32px}
.brand{display:flex;align-items:center;color:#fff;flex:none}
.brand__img{display:block;height:48px;width:auto}
.nav__links{display:flex;align-items:center;gap:30px;margin-left:auto}
.nav__links a{font-size:14px;color:#e3ebff;position:relative;padding:8px 0;transition:color .2s;white-space:nowrap}
.nav__links a::after{content:"";position:absolute;left:0;right:100%;bottom:2px;height:2px;background:#5b9bff;transition:right .25s}
.nav__links a:hover{color:#fff}
.nav__links a:hover::after{right:0}
.nav__cta{padding:10px 20px;border-radius:6px;background:linear-gradient(100deg,#1a63f5,#0e46d8);color:#fff;font-size:14px;font-weight:600;box-shadow:0 6px 18px rgba(16,70,216,.35);transition:transform .2s,box-shadow .2s;white-space:nowrap}
.nav__cta:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(16,70,216,.45)}
.nav__toggle{display:none;width:42px;height:42px;margin-left:auto;border-radius:8px;position:relative}
.nav__toggle i{position:absolute;left:11px;width:20px;height:2px;background:#fff;border-radius:2px;transition:transform .25s,opacity .25s,top .25s}
.nav__toggle i:nth-child(1){top:14px}.nav__toggle i:nth-child(2){top:20px}.nav__toggle i:nth-child(3){top:26px}
.nav__toggle.is-active i:nth-child(1){top:20px;transform:rotate(45deg)}
.nav__toggle.is-active i:nth-child(2){opacity:0}
.nav__toggle.is-active i:nth-child(3){top:20px;transform:rotate(-45deg)}

/* ============ Hero ============ */
.hero{position:relative;min-height:620px;height:min(740px,82vh);display:flex;align-items:center;overflow:hidden;isolation:isolate;
  background:linear-gradient(118deg,#06114c 0%,#0a1c6c 45%,#102c92 100%)}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(760px 430px at 76% 30%,rgba(58,126,255,.32),transparent 72%);z-index:-1}
.hero__wave{position:absolute;left:0;right:0;bottom:0;height:40%;z-index:-1;opacity:.9;
  background:url(../images/bg-tech-wave.jpg) center bottom/cover no-repeat;
  -webkit-mask-image:linear-gradient(to bottom,transparent,#000 42%);mask-image:linear-gradient(to bottom,transparent,#000 42%)}
.hero__art{position:absolute;right:0;bottom:0;width:auto;height:auto;max-width:54%;max-height:calc(100% - 76px);z-index:-1;
  -webkit-mask-image:linear-gradient(to right,transparent 0,#000 24%);mask-image:linear-gradient(to right,transparent 0,#000 24%)}
.hero__inner{position:relative;z-index:2;padding-top:36px}
.hero__kicker{font-size:11px;letter-spacing:3.4px;color:#8fb3ff;font-weight:600;margin-bottom:22px}
.hero h1{max-width:660px;font-size:clamp(32px,3.7vw,52px);line-height:1.34;font-weight:700;color:#fff;letter-spacing:1px;text-shadow:0 4px 24px rgba(0,10,60,.3)}
.hero h1 span{color:#eaf2ff}
.hero__desc{margin-top:22px;font-size:16px;letter-spacing:.6px;color:#c3d5ff}
.hero__actions{display:flex;gap:14px;margin-top:38px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 26px;border-radius:6px;font-size:14px;font-weight:600;transition:transform .2s,box-shadow .2s,background .2s}
.btn svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.btn--primary{background:linear-gradient(100deg,#1f6bff,#0f45d6);color:#fff;box-shadow:0 10px 26px rgba(15,69,214,.42)}
.btn--primary:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(15,69,214,.55)}
.btn--ghost{border:1px solid rgba(180,205,255,.6);color:#e8f1ff;background:rgba(255,255,255,.04)}
.btn--ghost:hover{background:rgba(255,255,255,.13);transform:translateY(-3px)}

/* ============ 测量流程 ============ */
.flow__grid{display:grid;grid-template-columns:1.05fr 1fr;gap:64px;align-items:center}
.flow__pic{position:relative}
.flow__pic img{width:100%;border-radius:12px}
.flow__content .sec-head{margin-bottom:34px}
.flow__content .sec-head h2{font-size:32px}
.flow__features{display:grid;gap:16px}
.feature{display:flex;gap:16px;align-items:flex-start;background:#f0f1f4;border-radius:8px;padding:20px 22px}
.feature__icon{width:34px;height:34px;border-radius:50%;background:#fff;color:#1a63f0;display:grid;place-items:center;flex:none;box-shadow:0 3px 10px rgba(20,60,160,.1)}
.feature__icon .icon{width:20px;height:20px}
.feature h3{font-size:17px;font-weight:700;color:#26314a;margin-bottom:6px}
.feature p{font-size:13px;line-height:1.8;color:#687284}

/* ============ 智能设备 ============ */
.devices{background:linear-gradient(160deg,#0a1f7a 0%,#0d2a94 55%,#0a2174 100%);overflow:hidden}
.devices::after{content:"";position:absolute;left:0;right:0;bottom:0;height:46%;opacity:.32;pointer-events:none;
  background:url(../images/bg-tech-wave.jpg) center bottom/cover no-repeat;
  -webkit-mask-image:linear-gradient(to bottom,transparent,#000);mask-image:linear-gradient(to bottom,transparent,#000)}
.devices .wrap{position:relative;z-index:1}
.devices .sec-head{margin-bottom:40px}
.devices__grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.device{background:linear-gradient(160deg,#f7f9fd,#dfe7f4);border-radius:6px;padding:22px 10px 24px;text-align:center;transition:transform .28s,box-shadow .28s}
.device:hover{transform:translateY(-7px);box-shadow:0 18px 36px rgba(2,12,60,.4)}
.device__pic{height:104px;background:center/contain no-repeat;margin-bottom:16px}
.device h3{font-size:15px;font-weight:700;color:#1c2436;letter-spacing:.5px}
.device__line{display:block;width:30px;height:2px;background:var(--violet);margin:12px auto 0;border-radius:2px}

/* ============ 高精度激光雷达 ============ */
.lidar{background:#05070a;overflow:hidden}
.lidar::before{content:"";position:absolute;right:-10%;top:-20%;width:60%;height:140%;background:radial-gradient(closest-side,rgba(24,54,110,.28),transparent);pointer-events:none}
.lidar__grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;position:relative}
.lidar .sec-head{margin-bottom:36px}
.lidar__cards{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.lcard{border-radius:8px;padding:20px 18px;color:#fff;min-height:132px;position:relative;overflow:hidden;transition:transform .25s}
.lcard:hover{transform:translateY(-5px)}
.lcard::after{content:"";position:absolute;right:-18px;top:-18px;width:80px;height:80px;border:1px solid rgba(255,255,255,.14);border-radius:50%}
.lcard--cyan{background:linear-gradient(135deg,#12837f,#1aa39c)}
.lcard--blue{background:linear-gradient(135deg,#122fa8,#1b3fd0)}
.lcard--blue2{background:linear-gradient(135deg,#0c258e,#1639c4)}
.lcard--cyan2{background:linear-gradient(135deg,#167f84,#1b9b93)}
.lcard .lcard__ico{width:28px;height:28px;margin-bottom:10px;color:#dff6ff}
.lcard .lcard__ico .icon{width:24px;height:24px}
.lcard h3{font-size:16px;font-weight:700;margin-bottom:8px}
.lcard p{font-size:11.5px;line-height:1.75;color:rgba(233,244,255,.82)}
.lidar__pic{border-radius:4px;overflow:hidden}
.lidar__pic img{width:100%;height:auto}

/* ============ AI 算法 ============ */
.ai__grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.ai .sec-head{margin-bottom:40px}
.ai__cards{display:grid;gap:16px}
.acard{display:flex;gap:15px;align-items:flex-start;border-radius:8px;padding:22px 24px;transition:transform .25s,box-shadow .25s}
.acard:hover{transform:translateX(6px);box-shadow:0 12px 28px rgba(20,70,180,.12)}
.acard--1{background:#adc9ff}.acard--2{background:#a3e7f6}
.acard__ico{color:#0d3fb8;flex:none;margin-top:2px}
.acard__ico .icon{width:26px;height:26px}
.acard h3{font-size:17px;font-weight:700;color:#122a63;margin-bottom:7px}
.acard p{font-size:12.5px;line-height:1.8;color:#37538a}
.ai__pic img{width:100%;border-radius:8px;box-shadow:0 16px 40px rgba(6,20,70,.16)}

/* ============ 通用图片卡（平台 / 应用 / 案例） ============ */
.pcards{display:grid;gap:26px}
.pcards--4{grid-template-columns:repeat(4,1fr)}
.pcards--3{grid-template-columns:repeat(3,1fr)}
.pcard{text-align:center;group}
.pcard__pic{overflow:hidden;border-radius:3px;background:#f2f5f9}
.pcard__pic img{width:100%;height:100%;object-fit:cover;transition:transform .45s}
.pcard:hover .pcard__pic img{transform:scale(1.06)}
.pcard h3{font-size:15px;font-weight:600;color:#2b3242;margin-top:18px;letter-spacing:.4px}
.pcard__line{display:block;width:34px;height:2px;background:var(--violet);margin:12px auto 0;border-radius:2px}
.pcard--plat .pcard__pic{aspect-ratio:1.62}
.pcard--app .pcard__pic{aspect-ratio:1.7}
.pcard--case .pcard__pic{aspect-ratio:.94}
.pcard--case h3{margin-top:16px}

/* ============ 页脚 ============ */
.footer{background:linear-gradient(160deg,#061452,#0a1f70);color:#c5d4f5;padding:64px 0 0}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer h4{font-size:15px;color:#fff;margin-bottom:20px;font-weight:700}
.footer__about p{font-size:13px;line-height:2;color:#a9bde8;max-width:330px}
.footer__brand{margin-bottom:18px}
.footer__brand .brand__img{height:44px}
.footer li{margin-bottom:11px}
.footer li a{font-size:13px;color:#a9bde8;transition:color .2s}
.footer li a:hover{color:#fff}
.footer__contact p{font-size:13px;line-height:2.1;color:#a9bde8}
.footer__contact strong{color:#fff;font-weight:600}
.footer__bar{border-top:1px solid rgba(160,190,255,.16);padding:18px 0 22px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:12px;color:#8ba3d6}

/* 返回顶部 */
.toTop{position:fixed;right:24px;bottom:26px;z-index:90;width:44px;height:44px;border-radius:10px;background:#1457f5;color:#fff;display:grid;place-items:center;box-shadow:0 10px 26px rgba(16,70,216,.4);opacity:0;visibility:hidden;transform:translateY(12px);transition:.3s}
.toTop.show{opacity:1;visibility:visible;transform:none}
.toTop:hover{background:#0e46d8}
.toTop svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ============ 响应式 ============ */
@media (max-width:1080px){
  .section{padding:72px 0}
  .flow__grid,.ai__grid,.lidar__grid{gap:36px}
  .devices__grid{grid-template-columns:repeat(3,1fr)}
  .nav__links{gap:18px}
  .nav__links a{font-size:13px}
  .brand__img{height:42px}
}
@media (max-width:820px){
  .wrap{width:min(100% - 36px,680px)}
  .nav{height:64px}
  .brand__img{height:38px}
  .footer__brand .brand__img{height:38px}
  .nav__toggle{display:block}
  .nav__cta{display:none}
  .nav__links{position:absolute;top:64px;left:0;right:0;margin:0;display:none;flex-direction:column;align-items:stretch;gap:0;
    background:rgba(6,20,76,.98);padding:8px 18px 18px;box-shadow:0 18px 30px rgba(2,10,44,.3)}
  .nav__links.is-open{display:flex}
  .nav__links a{padding:13px 6px;font-size:15px;border-bottom:1px solid rgba(160,190,255,.12)}
  .nav__links a::after{display:none}
  section[id]{scroll-margin-top:64px}
  .section{padding:60px 0}
  .sec-head h2{font-size:27px}
  .sec-head p{font-size:13px}
  .hero{height:auto;min-height:0;padding:104px 0 0;display:block}
  .hero__inner{padding:0 0 0}
  .hero__art{position:relative;width:100%;height:auto;max-width:none;max-height:none;object-fit:contain;right:auto;bottom:auto;display:block;margin-top:20px;
    -webkit-mask-image:linear-gradient(to bottom,transparent 0,#000 12%);mask-image:linear-gradient(to bottom,transparent 0,#000 12%)}
  .hero__wave{display:none}
  .hero h1{font-size:clamp(28px,6.6vw,40px)}
  .hero__desc{font-size:14px}
  .hero__kicker{font-size:10px;letter-spacing:2.4px;margin-bottom:16px}
  .hero__actions{margin-top:28px}
  .flow__grid,.ai__grid,.lidar__grid{grid-template-columns:1fr;gap:30px}
  .flow__pic{max-width:520px;margin-inline:auto}
  .flow__content .sec-head h2{font-size:26px}
  .ai .sec-head,.lidar .sec-head{margin-bottom:26px}
  .lidar__pic{max-width:520px;margin-inline:auto}
  .pcards--4{grid-template-columns:repeat(2,1fr);gap:22px}
  .pcards--3{grid-template-columns:repeat(2,1fr);gap:22px}
  .pcards--3 .pcard:last-child{grid-column:1/-1;max-width:calc(50% - 11px);margin-inline:auto}
  .footer__grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .footer__contact{grid-column:1/-1}
}
@media (max-width:560px){
  .wrap{width:calc(100% - 30px)}
  .section{padding:48px 0}
  .sec-head{padding-left:16px;margin-bottom:28px}
  .sec-head h2{font-size:23px}
  .sec-head p{font-size:12px;line-height:1.8}
  .devices__grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .device{padding:16px 6px 18px}
  .device__pic{height:86px;margin-bottom:12px}
  .device h3{font-size:13px}
  .lidar__cards{grid-template-columns:1fr 1fr;gap:10px}
  .lcard{padding:15px 13px;min-height:0}
  .lcard h3{font-size:14px}
  .lcard p{font-size:10.5px;line-height:1.65}
  .lcard .lcard__ico{width:22px;height:22px;margin-bottom:7px}
  .lcard .lcard__ico .icon{width:19px;height:19px}
  .acard{padding:17px 16px;gap:11px}
  .acard h3{font-size:15px}
  .acard p{font-size:11.5px}
  .feature{padding:16px;gap:12px}
  .feature h3{font-size:15px}
  .feature p{font-size:12px}
  .pcards--4,.pcards--3{gap:16px}
  .pcard h3{font-size:13px}
  .pcard--case h3{font-size:13px}
  .btn{padding:11px 20px;font-size:13px}
  .footer{padding-top:48px}
  .footer__grid{grid-template-columns:1fr 1fr;gap:24px}
  .footer__about{grid-column:1/-1}
  .footer__bar{justify-content:center;text-align:center}
}
@media (max-width:390px){
  .hero h1{font-size:27px}
  .lcard{padding:14px 11px}
  .lcard p{font-size:10px}
  .pcards--4{grid-template-columns:1fr 1fr;gap:12px}
}