/* ============================================================
   世佳软件 · 官网改版 V2
   视觉世界：工程图纸 × 车间看板
   —— 冷白纸、墨蓝字、铜色证据、1px 结构线、等宽数字
   ============================================================ */

:root{
  --ink:#0A1424;
  --ink-2:#28344A;
  --ink-3:#5B6A80;
  --ink-4:#8B97A8;
  --paper:#F7F8FA;
  --paper-2:#EEF1F5;
  --white:#FFFFFF;
  --line:#E1E6ED;
  --line-2:#C7D0DC;
  --blue:#1F5BD8;
  --blue-deep:#0F3291;
  --copper:#A85A22;
  --copper-lite:#E2A06A;
  --ok:#1E7A4B;

  --font: "HarmonyOS Sans SC","MiSans","PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",sans-serif;
  --mono: "Bahnschrift","DIN Alternate","SF Mono","JetBrains Mono",Consolas,monospace;

  --wrap: 1240px;
  --gutter: 32px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--white);
  color:var(--ink);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
h1,h2,h3,h4,p,figure{ margin:0; }
::selection{ background:var(--blue); color:#fff; }

.wrap{ width:100%; max-width:var(--wrap); margin:0 auto; padding:0 var(--gutter); }
.mono{ font-family:var(--mono); font-variant-numeric:tabular-nums; letter-spacing:.02em; }

/* ---------- 顶部 ---------- */
.hd{
  position:sticky; top:0; z-index:60;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(140%) blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease, background .25s ease;
}
.hd.solid{ border-bottom-color:var(--line); background:rgba(255,255,255,.94); }
.hd .bar{
  height:76px; display:flex; align-items:center; gap:28px;
}
.logo img{ height:34px; width:auto; }
.h-slogan{
  font-size:13px; color:var(--ink-3); letter-spacing:.08em;
  padding-left:28px; border-left:1px solid var(--line);
  white-space:nowrap;
}
.hd nav{ display:flex; gap:30px; margin-left:auto; }
.hd nav a{
  font-size:15px; color:var(--ink-2); position:relative; padding:6px 0;
  transition:color .2s ease;
}
.hd nav a:hover{ color:var(--blue); }
.hd nav a.active{ color:var(--ink); font-weight:600; }
.hd nav a.active::after{
  content:""; position:absolute; left:0; right:0; bottom:-2px;
  height:2px; background:var(--blue);
}
.h-tel{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--mono); font-size:17px; font-weight:600;
  color:var(--ink); white-space:nowrap;
  padding-left:26px; border-left:1px solid var(--line);
}
.h-tel svg{ width:18px; height:18px; color:var(--blue); }
.nav-toggle{ display:none; }

/* ---------- 章节骨架 ---------- */
section{ position:relative; }
.sec{ padding:104px 0; }
.sec.tight{ padding:72px 0; }
.sec.paper{ background:var(--paper); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.sec-head{
  display:grid; grid-template-columns:1fr auto; align-items:end; gap:40px;
  padding-bottom:36px; border-bottom:1px solid var(--line);
}
.idx{
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--mono); font-size:12px; letter-spacing:.14em;
  color:var(--ink-4); text-transform:uppercase;
}
.idx b{ color:var(--blue); font-weight:600; }
.sec-head h2{
  margin-top:18px;
  font-size:clamp(28px,3.2vw,40px); line-height:1.24; font-weight:700;
  letter-spacing:-.01em; max-width:20em;
}
.sec-head h2 em{ font-style:normal; color:var(--blue); }
.sec-head p{
  margin-top:16px; max-width:44em; color:var(--ink-3); font-size:16px;
}
.more{
  font-family:var(--mono); font-size:12.5px; letter-spacing:.1em;
  color:var(--ink-3); white-space:nowrap;
  border-bottom:1px solid var(--line-2); padding-bottom:6px;
  transition:color .2s ease,border-color .2s ease;
}
.more:hover{ color:var(--blue); border-color:var(--blue); }

/* ---------- Hero ---------- */
.hero{ padding:78px 0 0; overflow:hidden; }
.hero::before{
  content:""; position:absolute; inset:0; pointer-events:none;
  background:
    radial-gradient(900px 460px at 78% -12%, rgba(31,91,216,.10), transparent 70%),
    linear-gradient(180deg, var(--paper) 0%, rgba(247,248,250,0) 46%);
}
.hero .wrap{ position:relative; }
.hero-grid{
  display:grid; grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);
  gap:64px; align-items:center;
}
.eyebrow{
  display:inline-flex; align-items:center; gap:12px;
  font-family:var(--mono); font-size:12px; letter-spacing:.16em;
  color:var(--ink-4); text-transform:uppercase;
}
.eyebrow i{ width:36px; height:1px; background:var(--copper-lite); }
.hero h1{
  margin-top:24px;
  font-size:clamp(34px,4.1vw,56px);
  line-height:1.06; font-weight:800; letter-spacing:-.02em;
}
.hero h1 span{ display:block; text-wrap:balance; }
.hero h1 .l2{ color:var(--blue); }
.hero .lead{
  margin-top:26px; max-width:30em;
  font-size:clamp(16px,1.5vw,18px); line-height:1.85; color:var(--ink-2);
}
.hero .actions{ margin-top:36px; display:flex; gap:14px; flex-wrap:wrap; }

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  height:52px; padding:0 28px;
  font-size:15px; font-weight:600; letter-spacing:.01em;
  background:var(--blue); color:#fff; border:1px solid var(--blue);
  transition:background .2s ease, transform .2s ease, box-shadow .2s ease;
}
.btn:hover{ background:var(--blue-deep); box-shadow:0 8px 24px -12px rgba(15,50,145,.6); transform:translateY(-1px); }
.btn.ghost{ background:transparent; color:var(--ink); border-color:var(--line-2); }
.btn.ghost:hover{ color:var(--blue); border-color:var(--blue); background:#fff; box-shadow:none; }

/* 主视觉：系统界面画框 */
.hero-vis{ position:relative; padding-bottom:18px; }
.frame{
  position:relative; background:#fff;
  border:1px solid var(--line-2);
  box-shadow:0 28px 70px -40px rgba(10,20,36,.42), 0 2px 0 rgba(10,20,36,.02);
}
.frame::before{
  content:""; display:block; height:34px;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(circle at 18px 17px, #E0605A 0 4px, transparent 4.5px),
    radial-gradient(circle at 34px 17px, #E3B04B 0 4px, transparent 4.5px),
    radial-gradient(circle at 50px 17px, #63B87F 0 4px, transparent 4.5px),
    linear-gradient(180deg,#FAFBFC,#F2F4F8);
}
.frame img{ width:100%; height:auto; }
.frame-cap{
  display:flex; justify-content:space-between; gap:16px;
  margin-top:12px; font-family:var(--mono); font-size:11.5px;
  letter-spacing:.08em; color:var(--ink-4);
}
.hero-badge{
  position:absolute; right:-10px; bottom:44px;
  background:var(--white); border:1px solid var(--line-2);
  padding:10px 14px; font-family:var(--mono); font-size:11.5px; letter-spacing:.1em;
  color:var(--ink-2); box-shadow:0 12px 30px -22px rgba(10,20,36,.5);
}
.hero-badge b{ color:var(--copper); }

/* 客户带 */
.trust{
  margin-top:64px; border-top:1px solid var(--line);
  background:var(--white);
}
.trust .wrap{
  display:flex; align-items:center; gap:28px; flex-wrap:wrap;
  padding-top:20px; padding-bottom:20px;
}
.trust span{
  font-family:var(--mono); font-size:11.5px; letter-spacing:.14em;
  color:var(--ink-4); white-space:nowrap;
}
.trust ul{
  display:flex; gap:26px; flex-wrap:wrap; margin:0; padding:0; list-style:none;
}
.trust li{ font-size:13.5px; color:var(--ink-3); }
.trust li::before{ content:"·"; margin-right:8px; color:var(--line-2); }

/* ---------- 数据带 ---------- */
.stats{ border-top:1px solid var(--line); border-bottom:1px solid var(--line); background:var(--white); }
.stats .wrap{ display:grid; grid-template-columns:repeat(4,1fr); }
.stat{ padding:34px 28px 34px 0; border-left:1px solid var(--line); padding-left:28px; }
.stat:first-child{ border-left:0; padding-left:0; }
.stat .n{
  font-family:var(--mono); font-size:clamp(34px,3.6vw,46px); font-weight:600;
  line-height:1; letter-spacing:-.02em; color:var(--ink);
}
.stat .n em{ font-style:normal; font-size:.4em; margin-left:4px; color:var(--ink-3); }
.stat .t{ margin-top:12px; font-size:13.5px; color:var(--ink-3); }

/* ---------- 产品矩阵 ---------- */
.pgrid{
  margin-top:44px;
  display:grid; grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1px; background:var(--line); border:1px solid var(--line);
}
.pcard{
  background:var(--white); padding:36px 36px 32px;
  display:grid; grid-template-columns:1fr 176px; gap:28px;
  transition:background .25s ease;
}
.pcard:hover{ background:#FBFCFE; }
.pcard .no{
  font-family:var(--mono); font-size:12px; letter-spacing:.12em; color:var(--ink-4);
}
.pcard h3{
  margin-top:10px; font-size:23px; line-height:1.32; font-weight:700; letter-spacing:-.01em;
}
.pcard .desc{ margin-top:12px; font-size:14.5px; color:var(--ink-3); line-height:1.8; }
.pcard .mods{
  margin:18px 0 0; padding:0; list-style:none;
  display:flex; flex-wrap:wrap; gap:8px;
}
.pcard .mods li{
  font-size:12.5px; color:var(--ink-2);
  border:1px solid var(--line); padding:4px 10px; background:var(--paper);
}
.pcard .go{
  margin-top:22px; display:inline-flex; align-items:center; gap:8px;
  font-size:13.5px; font-weight:600; color:var(--blue);
}
.pcard .go i{ width:16px; height:1px; background:var(--blue); transition:width .2s ease; }
.pcard:hover .go i{ width:26px; }
.pcard .ph{
  align-self:start; border:1px solid var(--line); background:var(--paper);
  aspect-ratio:1/1; overflow:hidden;
}
.pcard .ph img{ width:100%; height:100%; object-fit:cover; transition:transform .5s ease; }
.pcard:hover .ph img{ transform:scale(1.035); }

/* ---------- 为什么 ---------- */
.why-grid{ display:grid; grid-template-columns:300px minmax(0,1fr); gap:64px; }
.why-head h2{
  margin-top:18px; font-size:clamp(28px,3vw,38px); line-height:1.22; font-weight:700;
}
.why-head p{ margin-top:18px; color:var(--ink-3); font-size:15px; }
.why-list{ margin:0; padding:0; list-style:none; border-top:1px solid var(--line); }
.why-list li{
  display:grid; grid-template-columns:64px minmax(0,1fr); gap:24px;
  padding:26px 0; border-bottom:1px solid var(--line);
  transition:background .2s ease;
}
.why-list li:hover{ background:#FBFCFE; }
.why-list .no{
  font-family:var(--mono); font-size:13px; color:var(--copper);
  padding-top:4px;
}
.why-list h3{ font-size:19px; font-weight:700; letter-spacing:-.01em; }
.why-list .claim{
  margin-top:6px; font-size:15px; color:var(--blue-deep); font-weight:600;
}
.why-list .note{ margin-top:8px; font-size:14.5px; color:var(--ink-3); line-height:1.8; }

/* ---------- 方案 ---------- */
.slist{ margin-top:44px; display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:24px; }
.scard{
  position:relative; display:block; overflow:hidden;
  border:1px solid var(--line); background:var(--ink);
  min-height:360px;
}
.scard img{
  width:100%; height:100%; object-fit:cover; position:absolute; inset:0;
  transition:transform .6s ease, opacity .3s ease; opacity:.92;
}
.scard::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(10,20,36,0) 34%, rgba(10,20,36,.86) 100%);
}
.scard:hover img{ transform:scale(1.045); opacity:1; }
.scard .sc{
  position:relative; z-index:1; display:flex; flex-direction:column; justify-content:flex-end;
  height:100%; min-height:360px; padding:30px 32px;
}
.scard .sc span{
  font-family:var(--mono); font-size:11.5px; letter-spacing:.14em; color:var(--copper-lite);
}
.scard h3{
  margin-top:12px; font-size:23px; line-height:1.36; font-weight:700; color:#fff;
}
.scard em{
  margin-top:12px; font-style:normal; font-size:13.5px; color:rgba(255,255,255,.72);
  padding-top:12px; border-top:1px solid rgba(255,255,255,.22);
}

/* ---------- CTA ---------- */
.cta{ background:var(--ink); color:#fff; padding:76px 0; }
.cta .wrap{ display:flex; align-items:center; justify-content:space-between; gap:48px; flex-wrap:wrap; }
.cta h2{ font-size:clamp(24px,2.8vw,34px); line-height:1.3; font-weight:700; letter-spacing:-.01em; }
.cta h2 em{ font-style:normal; color:var(--copper-lite); }
.cta p{ margin-top:14px; color:rgba(255,255,255,.66); font-size:15px; }
.cta .act{ display:flex; gap:14px; flex-wrap:wrap; }
.cta .btn{ background:#fff; color:var(--ink); border-color:#fff; }
.cta .btn:hover{ background:var(--paper-2); box-shadow:none; }
.cta .btn.ghost{ background:transparent; color:#fff; border-color:rgba(255,255,255,.34); }
.cta .btn.ghost:hover{ border-color:#fff; background:rgba(255,255,255,.08); }

/* ---------- 页脚 ---------- */
footer{ background:var(--paper); border-top:1px solid var(--line); padding:64px 0 28px; }
.ftop{
  display:grid; grid-template-columns:1.15fr 1fr .9fr; gap:56px;
  padding-bottom:44px; border-bottom:1px solid var(--line);
}
.fslogan .no{
  font-family:var(--mono); font-size:11.5px; letter-spacing:.14em; color:var(--ink-4);
}
.fslogan p{
  margin-top:18px; font-size:clamp(24px,2.6vw,32px); line-height:1.28; font-weight:700;
}
.fslogan em{ font-style:normal; color:var(--blue); }
.fitem{ padding:14px 0; border-bottom:1px solid var(--line); }
.fitem:first-child{ padding-top:0; }
.fk{ font-family:var(--mono); font-size:11.5px; letter-spacing:.12em; color:var(--ink-4); }
.fitem p{ margin-top:8px; font-size:14px; color:var(--ink-2); }
.fcontact h5{
  font-family:var(--mono); font-size:11.5px; letter-spacing:.14em; color:var(--ink-4);
  margin:0 0 16px;
}
.fcontact a{ display:block; font-size:14px; color:var(--ink-2); margin-bottom:10px; }
.fcontact .ftel{
  font-family:var(--mono); font-size:24px; font-weight:600; color:var(--ink);
  margin-bottom:14px;
}
.fqr{ margin-top:18px; }
.fqr figure{ width:112px; }
.fqr img{ width:100%; height:auto; aspect-ratio:1/1; display:block; border:1px solid var(--line); background:#fff; padding:6px; }
.fqr figcaption{ margin-top:8px; font-size:11.5px; color:var(--ink-4); }
.flinks{
  display:grid; grid-template-columns:repeat(4,1fr); gap:32px;
  padding:40px 0 34px; border-bottom:1px solid var(--line);
}
.fg h4{
  font-size:13px; font-weight:600; color:var(--ink); margin:0 0 14px;
}
.fg a{ display:block; font-size:13.5px; color:var(--ink-3); margin-bottom:10px; transition:color .2s ease; }
.fg a:hover{ color:var(--blue); }
.fbottom{
  padding-top:24px; display:flex; justify-content:space-between; gap:20px; flex-wrap:wrap;
  font-size:12.5px; color:var(--ink-4);
}

/* ---------- 动效 ---------- */
.riser{ opacity:1; transform:none; }
.js .riser{ opacity:0; transform:translateY(14px); }
.js .riser.in{ opacity:1; transform:none; transition:opacity .7s ease var(--d,0s), transform .7s cubic-bezier(.22,.61,.36,1) var(--d,0s); }
@media (prefers-reduced-motion: reduce){
  .riser{ opacity:1; transform:none; }
  html{ scroll-behavior:auto; }
}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  :root{ --gutter:26px; }
  .hero-grid{ grid-template-columns:1fr; gap:44px; }
  .hero-vis{ max-width:720px; }
  .why-grid{ grid-template-columns:1fr; gap:36px; }
  .ftop{ grid-template-columns:1fr 1fr; gap:36px; }
  .pcard{ grid-template-columns:1fr; gap:20px; padding:28px; }
  .pcard .ph{ order:-1; aspect-ratio:16/9; }
}
@media (max-width:900px){
  .hd .bar{ height:64px; }
  .h-slogan{ display:none; }
  .h-tel{ padding-left:0; border-left:0; font-size:15px; margin-left:auto; }
  .hd nav{
    position:absolute; left:0; right:0; top:64px;
    background:#fff; border-bottom:1px solid var(--line);
    flex-direction:column; gap:0; padding:8px 26px 18px;
    display:none;
  }
  body.nav-open .hd nav{ display:flex; }
  .hd nav a{ padding:14px 0; border-bottom:1px solid var(--line); font-size:16px; }
  .hd nav a.active::after{ display:none; }
  .nav-toggle{
    display:inline-flex; flex-direction:column; justify-content:center; gap:5px;
    width:42px; height:42px; margin-left:12px; padding:0 10px;
    background:transparent; border:1px solid var(--line-2); cursor:pointer;
  }
  .nav-toggle span{ display:block; height:1.5px; background:var(--ink); }
  .sec{ padding:72px 0; }
  .sec-head{ grid-template-columns:1fr; gap:18px; }
  .pgrid{ grid-template-columns:1fr; }
  .slist{ grid-template-columns:1fr; }
  .stats .wrap{ grid-template-columns:repeat(2,1fr); }
  .stat{ padding:26px 20px; }
  .stat:nth-child(odd){ padding-left:0; border-left:0; }
  .stat:nth-child(-n+2){ border-bottom:1px solid var(--line); }
  .ftop{ grid-template-columns:1fr; gap:28px; }
  .flinks{ grid-template-columns:repeat(2,1fr); gap:26px; }
  .hero{ padding-top:44px; }
  .hero h1{ letter-spacing:-.015em; }
}
@media (max-width:600px){
  :root{ --gutter:20px; }
  .hero .lead{ font-size:15.5px; line-height:1.9; }
  .hero .actions{ gap:10px; }
  .btn{ height:48px; padding:0 20px; font-size:14.5px; flex:1 1 auto; }
  .hero-badge{ display:none; }
  .trust{ margin-top:44px; }
  .trust ul{ gap:14px; }
  .stat .n{ font-size:30px; }
  .pcard h3{ font-size:20px; }
  .scard, .scard .sc{ min-height:300px; }
  .scard h3{ font-size:20px; }
  .cta .wrap{ gap:28px; }
  .cta .act{ width:100%; }
  .fbottom{ flex-direction:column; gap:8px; }
}