/* =========================================================
   深圳市简溯云科技有限公司 — 企业官网样式
   ========================================================= */

:root{
  --ink:#0a1020;
  --ink-2:#101a30;
  --blue:#2563eb;
  --blue-l:#3b82f6;
  --cyan:#06b6d4;
  --text:#0f172a;
  --muted:#5c6b85;
  --muted-2:#8494ad;
  --line:rgba(15,23,42,.09);
  --bg:#ffffff;
  --soft:#f5f8fd;
  --radius:18px;
  --radius-lg:24px;
  --shadow-sm:0 2px 8px rgba(15,23,42,.05);
  --shadow:0 14px 34px -12px rgba(15,23,42,.16);
  --shadow-lg:0 30px 60px -24px rgba(15,23,42,.3);
  --max:1180px;
  --nav-h:74px;
  --ease:cubic-bezier(.22,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}

.container{width:100%;max-width:var(--max);margin-inline:auto;padding-inline:24px}

/* ---------------- 按钮 ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:999px;
  padding:12px 26px;font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s,color .25s,border-color .25s;
  font-family:inherit;white-space:nowrap;
}
.btn--primary{
  background:linear-gradient(120deg,var(--blue) 0%,#1d4ed8 45%,var(--cyan) 130%);
  color:#fff;box-shadow:0 10px 26px -10px rgba(37,99,235,.7);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px -12px rgba(37,99,235,.75)}
.btn--ghost{
  background:rgba(255,255,255,.06);color:#eaf1ff;border-color:rgba(255,255,255,.24);
  backdrop-filter:blur(6px);
}
.btn--ghost:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.45);transform:translateY(-2px)}
.btn--lg{padding:15px 34px;font-size:16px}
.btn--sm{padding:9px 18px;font-size:14px}
.btn--block{width:100%}

/* ---------------- 导航 ---------------- */
.nav{
  position:fixed;inset:0 0 auto 0;height:var(--nav-h);z-index:100;
  display:flex;align-items:center;
  transition:background .35s var(--ease),box-shadow .35s var(--ease),backdrop-filter .35s;
}
.nav__inner{display:flex;align-items:center;justify-content:space-between;gap:24px}

.brand{display:inline-flex;align-items:center;gap:12px}
.brand__mark{display:block;filter:drop-shadow(0 6px 14px rgba(37,99,235,.35))}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__text strong{font-size:18px;font-weight:800;letter-spacing:.06em;color:#fff;transition:color .35s}
.brand__text em{font-style:normal;font-size:10px;letter-spacing:.24em;color:rgba(255,255,255,.6);transition:color .35s}

.nav__links{display:flex;align-items:center;gap:6px}
.nav__links a{
  position:relative;padding:9px 14px;border-radius:10px;font-size:15px;font-weight:500;
  color:rgba(255,255,255,.78);transition:color .3s,background .3s;
}
.nav__links a:not(.btn)::after{
  content:"";position:absolute;left:14px;right:14px;bottom:5px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--blue-l),var(--cyan));
  transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease);
}
.nav__links a:not(.btn):hover{color:#fff}
.nav__links a:not(.btn):hover::after,
.nav__links a.is-active::after{transform:scaleX(1)}
.nav__links a.is-active{color:#fff}
.nav__cta{margin-left:8px}

/* 滚动后：白底导航 */
.nav.is-scrolled{
  background:rgba(255,255,255,.9);
  backdrop-filter:blur(14px) saturate(160%);
  box-shadow:0 1px 0 var(--line),0 10px 30px -20px rgba(15,23,42,.4);
}
.nav.is-scrolled .brand__text strong{color:var(--text)}
.nav.is-scrolled .brand__text em{color:var(--muted-2)}
.nav.is-scrolled .nav__links a{color:var(--muted)}
.nav.is-scrolled .nav__links a:hover,
.nav.is-scrolled .nav__links a.is-active{color:var(--blue)}
.nav.is-scrolled .nav__links .nav__cta{color:#fff}

.nav__toggle{
  display:none;width:42px;height:42px;border:0;background:transparent;cursor:pointer;
  flex-direction:column;justify-content:center;gap:5px;padding:0 9px;border-radius:10px;
}
.nav__toggle span{display:block;height:2px;border-radius:2px;background:#fff;transition:transform .3s var(--ease),opacity .3s,background .35s}
.nav.is-scrolled .nav__toggle span{background:var(--text)}

/* ---------------- 首屏 ---------------- */
.hero{
  position:relative;isolation:isolate;overflow:hidden;
  padding:calc(var(--nav-h) + 92px) 0 96px;
  background:
    radial-gradient(1200px 600px at 78% -10%,rgba(37,99,235,.5),transparent 62%),
    radial-gradient(900px 520px at 8% 12%,rgba(6,182,212,.32),transparent 60%),
    linear-gradient(180deg,#0a1020 0%,#0c1428 60%,#0a1020 100%);
  color:#eaf1ff;text-align:center;
}
.hero__bg{position:absolute;inset:0;z-index:-1;pointer-events:none}
.hero__grid{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.055) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 22%,#000 0%,transparent 74%);
  -webkit-mask-image:radial-gradient(circle at 50% 22%,#000 0%,transparent 74%);
}
.hero__glow{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.hero__glow--a{width:420px;height:420px;left:-120px;top:120px;background:#2563eb;animation:float 14s ease-in-out infinite}
.hero__glow--b{width:360px;height:360px;right:-100px;top:40px;background:#06b6d4;animation:float 18s ease-in-out infinite reverse}
@keyframes float{0%,100%{transform:translate3d(0,0,0)}50%{transform:translate3d(24px,30px,0)}}

.hero__inner{position:relative;display:flex;flex-direction:column;align-items:center}

.pill{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 16px;border-radius:999px;font-size:13.5px;letter-spacing:.03em;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);
  color:#c9daf7;backdrop-filter:blur(8px);
}
.pill .dot{
  width:7px;height:7px;border-radius:50%;background:#34d399;
  box-shadow:0 0 0 4px rgba(52,211,153,.18);animation:pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

.hero__title{
  margin-top:26px;font-size:clamp(34px,5.4vw,64px);font-weight:850;letter-spacing:-.02em;
}
.hero__title .grad{
  background:linear-gradient(100deg,#60a5fa,#22d3ee 55%,#a78bfa);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero__sub{
  margin-top:22px;max-width:760px;font-size:clamp(15px,1.35vw,17.5px);
  color:rgba(226,236,255,.76);
}

.hero__actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:38px}

.stats{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;
  width:100%;max-width:920px;margin-top:64px;
  border:1px solid rgba(255,255,255,.12);border-radius:20px;
  background:rgba(255,255,255,.045);backdrop-filter:blur(10px);overflow:hidden;
}
.stats li{padding:24px 12px;border-left:1px solid rgba(255,255,255,.1)}
.stats li:first-child{border-left:0}
.stats b{
  display:block;font-size:clamp(20px,2.3vw,27px);font-weight:800;letter-spacing:-.01em;
  background:linear-gradient(100deg,#fff,#a5d8ff);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.stats span{display:block;margin-top:6px;font-size:13px;color:rgba(200,216,242,.7)}

/* ---------------- 通用区块 ---------------- */
.section{padding:104px 0}
.section--soft{background:var(--soft)}
.section--dark{
  background:
    radial-gradient(900px 460px at 82% 0%,rgba(37,99,235,.35),transparent 62%),
    linear-gradient(180deg,#0b1222,#0a1020);
  color:#eaf1ff;
}

.sec-head{max-width:720px;margin:0 auto 56px;text-align:center}
.sec-tag{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.22em;
  color:var(--blue);background:rgba(37,99,235,.08);
  padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
.sec-tag--light{color:#7dd3fc;background:rgba(125,211,252,.12)}
.sec-head h2,.contact h2{font-size:clamp(27px,3.3vw,40px);font-weight:820}
.sec-desc{margin-top:16px;color:var(--muted);font-size:16.5px}

/* ---------------- 关于我们 ---------------- */
.about{display:grid;grid-template-columns:1.35fr .95fr;gap:56px;align-items:start}
.about__text h3{font-size:23px;font-weight:750;margin-bottom:18px}
.about__text p{color:var(--muted);margin-bottom:16px;font-size:16.5px}
.about__text strong{color:var(--blue);font-weight:700}

.ticks{margin-top:26px;display:grid;gap:12px}
.ticks li{position:relative;padding-left:30px;color:var(--text);font-size:15.5px}
.ticks li::before{
  content:"";position:absolute;left:0;top:9px;width:16px;height:16px;border-radius:50%;
  background:linear-gradient(135deg,var(--blue),var(--cyan));
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5 13 4 4L19 7'/%3E%3C/svg%3E") center/12px 12px no-repeat,
        linear-gradient(#000,#000);
  mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5 13 4 4L19 7'/%3E%3C/svg%3E") center/12px 12px no-repeat;
  -webkit-mask-composite:source-out;mask-composite:subtract;
}

.about__card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:30px 28px;box-shadow:var(--shadow);
  position:relative;overflow:hidden;
}
.about__card::before{
  content:"";position:absolute;inset:0 0 auto 0;height:4px;
  background:linear-gradient(90deg,var(--blue),var(--cyan));
}
.about__card h4{font-size:15px;letter-spacing:.14em;color:var(--muted-2);font-weight:700;margin-bottom:18px}
.facts{display:grid;gap:2px;margin:0}
.facts > div{display:flex;justify-content:space-between;gap:16px;padding:13px 0;border-bottom:1px dashed var(--line)}
.facts > div:last-child{border-bottom:0}
.facts dt{color:var(--muted-2);font-size:14.5px;flex:0 0 auto}
.facts dd{margin:0;font-weight:600;font-size:14.5px;text-align:right}
.facts .mono{color:var(--blue);letter-spacing:-.01em}

/* ---------------- 业务卡片 ---------------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:32px 28px;box-shadow:var(--shadow-sm);
  transition:transform .4s var(--ease),box-shadow .4s var(--ease),border-color .4s;
  position:relative;overflow:hidden;
}
.card::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:3px;
  background:linear-gradient(90deg,var(--blue),var(--cyan));
  transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease);
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(37,99,235,.28)}
.card:hover::after{transform:scaleX(1)}
.card__ico{
  display:inline-flex;align-items:center;justify-content:center;
  width:52px;height:52px;border-radius:15px;margin-bottom:20px;
  color:#fff;background:linear-gradient(135deg,var(--blue),var(--cyan));
  box-shadow:0 12px 24px -12px rgba(37,99,235,.75);
}
.card__ico svg{width:25px;height:25px}
.card h3{font-size:19px;font-weight:750;margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}

/* ---------------- 优势 ---------------- */
.adv{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.adv__item{
  padding:30px 26px;border-radius:var(--radius);
  background:linear-gradient(180deg,#fff, #fbfdff);
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .4s var(--ease),box-shadow .4s var(--ease);
}
.adv__item:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.adv__item b{
  display:inline-block;font-size:14px;font-weight:800;letter-spacing:.08em;
  color:transparent;background:linear-gradient(120deg,var(--blue),var(--cyan));
  -webkit-background-clip:text;background-clip:text;
  padding:4px 0 12px;
}
.adv__item h3{font-size:18.5px;margin-bottom:10px;font-weight:750}
.adv__item p{color:var(--muted);font-size:15px}

/* ---------------- 联系我们 ---------------- */
.contact{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:start}
.contact h2{margin-top:4px}
.contact__left > p{color:rgba(214,228,250,.75);margin-top:16px;font-size:16.5px;max-width:520px}

.contact__list{margin-top:34px;display:grid;gap:14px}
.contact__list li{display:flex;gap:14px;align-items:flex-start;padding:16px 18px;border-radius:14px;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1)}
.contact__list .ico{
  flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:11px;color:#7dd3fc;
  background:rgba(125,211,252,.12);border:1px solid rgba(125,211,252,.22);
}
.contact__list .ico svg{width:19px;height:19px}
.contact__list em{display:block;font-style:normal;font-size:12.5px;letter-spacing:.1em;color:rgba(190,210,240,.6)}
.contact__list a,.contact__list p{font-size:15.5px;font-weight:600;color:#eaf1ff}
.contact__list a:hover{color:#7dd3fc;text-decoration:underline;text-underline-offset:3px}

.contact__card{
  background:rgba(255,255,255,.97);color:var(--text);
  border-radius:var(--radius-lg);padding:34px 30px;box-shadow:0 40px 80px -40px rgba(0,0,0,.75);
}
.contact__card h3{font-size:21px;font-weight:780}
.contact__card .muted{color:var(--muted);font-size:14.5px;margin-top:8px}

.form{margin-top:22px;display:grid;gap:14px}
.form label{display:block}
.form label > span{display:block;font-size:13.5px;font-weight:600;color:var(--muted);margin-bottom:7px}
.form input,.form select,.form textarea{
  width:100%;font-family:inherit;font-size:15px;color:var(--text);
  padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:#f8fafd;
  transition:border-color .25s,box-shadow .25s,background .25s;resize:vertical;
}
.form input:focus,.form select:focus,.form textarea:focus{
  outline:none;border-color:rgba(37,99,235,.5);background:#fff;
  box-shadow:0 0 0 4px rgba(37,99,235,.1);
}
.form input::placeholder,.form textarea::placeholder{color:#a8b4c8}
.form__tip{margin-top:4px;font-size:13.5px;min-height:20px;color:var(--blue)}

/* ---------------- 页脚 ---------------- */
.footer{background:#080d1a;color:#c3d0e6}
.footer__inner{
  display:grid;grid-template-columns:1.5fr .8fr 1fr;gap:48px;
  padding-block:64px 46px;
}
.brand--footer{align-items:flex-start}
.brand--footer .brand__text strong{font-size:16.5px;letter-spacing:.02em;color:#fff}
.brand--footer .brand__text em{color:rgba(255,255,255,.42)}
.footer__slogan{margin-top:18px;font-size:14px;color:#7c8db0;letter-spacing:.14em}
.footer__nav h4,.footer__info h4{
  font-size:13px;letter-spacing:.16em;color:#7c8db0;font-weight:700;margin-bottom:16px;
}
.footer__nav{display:flex;flex-direction:column;gap:10px}
.footer__nav a{font-size:14.5px;color:#c3d0e6;transition:color .25s,transform .25s;width:fit-content}
.footer__nav a:hover{color:#7dd3fc;transform:translateX(3px)}
.footer__info p{font-size:14px;color:#93a3c0;margin-bottom:8px}

.footer__bottom{
  border-top:1px solid rgba(255,255,255,.08);
  background:rgba(0,0,0,.28);
}
.footer__bottom-inner{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  flex-wrap:wrap;padding-block:20px;
}
.copyright{font-size:13.5px;color:#8e9db9}

.icp{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;color:#a9b8d2;
  padding:7px 15px;border-radius:999px;
  border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.04);
  transition:color .25s,border-color .25s,background .25s,transform .25s;
}
.icp__ico{width:16px;height:16px;flex:0 0 auto}
.icp:hover{
  color:#7dd3fc;border-color:rgba(125,211,252,.45);
  background:rgba(125,211,252,.1);transform:translateY(-1px);
}

/* ---------------- 回到顶部 ---------------- */
.to-top{
  position:fixed;right:22px;bottom:74px;z-index:90;
  width:44px;height:44px;border-radius:50%;border:1px solid var(--line);
  background:#fff;color:var(--blue);cursor:pointer;box-shadow:var(--shadow);
  display:inline-flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s,visibility .3s,transform .3s,background .25s,color .25s;
}
.to-top svg{width:18px;height:18px}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--blue);color:#fff;border-color:var(--blue)}

/* ---------------- 入场动画 ---------------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
.cards .reveal:nth-child(2),.adv .reveal:nth-child(2){transition-delay:.08s}
.cards .reveal:nth-child(3),.adv .reveal:nth-child(3){transition-delay:.16s}
.cards .reveal:nth-child(4),.adv .reveal:nth-child(4){transition-delay:.24s}
.cards .reveal:nth-child(5){transition-delay:.32s}
.cards .reveal:nth-child(6){transition-delay:.4s}

.pc-only{display:inline}

/* ---------------- 响应式 ---------------- */
@media (max-width:1080px){
  .about,.contact{grid-template-columns:1fr;gap:40px}
  .cards{grid-template-columns:repeat(2,1fr)}
  .adv{grid-template-columns:repeat(2,1fr)}
  .footer__inner{grid-template-columns:1fr 1fr;gap:36px}
}

@media (max-width:820px){
  .nav__toggle{display:flex}
  .nav.is-open{background:rgba(9,14,26,.96);backdrop-filter:blur(16px)}
  .nav__links{
    position:fixed;top:var(--nav-h);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:2px;
    background:rgba(9,14,26,.98);backdrop-filter:blur(16px);
    padding:14px 24px 24px;
    border-bottom:1px solid rgba(255,255,255,.1);
    transform:translateY(-12px);opacity:0;visibility:hidden;
    transition:transform .35s var(--ease),opacity .35s,visibility .35s;
  }
  .nav.is-open .nav__links{transform:none;opacity:1;visibility:visible}
  .nav__links a{color:#dbe6fb !important;padding:13px 12px;border-radius:10px}
  .nav__links a:not(.btn)::after{display:none}
  .nav__links a:not(.btn):hover{background:rgba(255,255,255,.07)}
  .nav__cta{margin:10px 0 0;justify-content:center}
  .nav.is-open .nav__toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav.is-open .nav__toggle span:nth-child(2){opacity:0}
  .nav.is-open .nav__toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .nav.is-open .nav__toggle span{background:#fff}

  .hero{padding-top:calc(var(--nav-h) + 60px);padding-bottom:72px}
  .stats{grid-template-columns:repeat(2,1fr);margin-top:48px}
  .stats li:nth-child(3){border-left:0;border-top:1px solid rgba(255,255,255,.1)}
  .stats li:nth-child(4){border-top:1px solid rgba(255,255,255,.1)}
  .section{padding:76px 0}
  .pc-only{display:none}
  .footer__bottom-inner{justify-content:center;text-align:center}
  .to-top{bottom:66px;right:16px}
}

@media (max-width:560px){
  .cards,.adv{grid-template-columns:1fr}
  .footer__inner{grid-template-columns:1fr;gap:30px;padding-block:48px 34px}
  .about__card,.contact__card{padding:26px 22px}
  .hero__actions{width:100%}
  .hero__actions .btn{flex:1 1 auto}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.01ms !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}