/* ============================================================
   喜文官网 · 深空 HUD 设计系统
   Cockpit 品牌语言：深空科技 · 青蓝辉光
   ============================================================ */
:root{
  --cyan:#5cf0ff;
  --blue:#37b6ff;
  --purple:#8a7bff;
  --ink:#0a0f24;
  --ink2:#05070f;
  --panel:rgba(18,32,67,.55);
  --panel-solid:#101a34;
  --hair:rgba(92,240,255,.16);
  --hair-strong:rgba(92,240,255,.34);
  --text:#dbe7ff;
  --dim:#8ea3c9;
  --dimmer:#63739a;
  --grad:linear-gradient(115deg,var(--cyan),var(--blue) 55%,var(--purple));
  --grad-soft:linear-gradient(115deg,rgba(92,240,255,.16),rgba(138,123,255,.16));
  --maxw:1200px;
  --r:18px;
  --shadow:0 24px 60px -28px rgba(4,10,30,.9);
  --glow:0 0 0 1px var(--hair), 0 20px 60px -32px rgba(46,230,255,.4);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--text);
  background:var(--ink2);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* 深空背景层 */
.bg-space{
  position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(1200px 700px at 82% -8%, rgba(46,230,255,.14), transparent 60%),
    radial-gradient(900px 600px at 10% 4%, rgba(138,123,255,.12), transparent 55%),
    radial-gradient(1000px 800px at 50% 120%, rgba(55,182,255,.10), transparent 60%),
    linear-gradient(180deg,#070c1e 0%, #060a18 40%, #05070f 100%);
}
.bg-grid{
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:
    linear-gradient(rgba(92,240,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(92,240,255,.045) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 50% 22%, #000 0%, transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 22%, #000 0%, transparent 78%);
}

/* 布局 */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
section{position:relative}
.section-pad{padding:96px 0}
@media(max-width:720px){.section-pad{padding:64px 0}}

a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

/* 文本工具 */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--cyan);font-weight:600;
  padding:6px 14px;border:1px solid var(--hair);border-radius:999px;
  background:rgba(92,240,255,.05);
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
h1,h2,h3{line-height:1.2;margin:0;font-weight:800;letter-spacing:-.01em}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:var(--dim);font-size:18px;max-width:60ch}
.dim{color:var(--dim)}

/* ===== 导航 ===== */
.nav{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  background:rgba(7,12,26,.72);
  border-bottom:1px solid var(--hair);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:17px}
.brand img{width:34px;height:34px;filter:drop-shadow(0 4px 14px rgba(46,230,255,.4))}
.brand .zh{letter-spacing:.02em}
.brand .en{color:var(--dim);font-weight:600;font-size:12px;letter-spacing:.18em;text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  padding:9px 15px;border-radius:10px;color:var(--dim);font-size:14.5px;font-weight:500;
  transition:.18s;
}
.nav-links a:hover{color:var(--text);background:rgba(92,240,255,.07)}
.nav-links a.active{color:var(--cyan)}
.nav-cta{
  margin-left:10px;padding:9px 18px;border-radius:10px;font-weight:700;font-size:14px;
  color:#04101c;background:var(--grad);
  box-shadow:0 10px 26px -12px rgba(46,230,255,.7);transition:.2s;
}
.nav-cta:hover{transform:translateY(-1px);filter:brightness(1.06)}
.nav-toggle{display:none;background:none;border:1px solid var(--hair);border-radius:10px;color:var(--text);width:42px;height:38px;font-size:18px;cursor:pointer}
@media(max-width:900px){
  .nav-links{
    position:absolute;top:66px;left:0;right:0;flex-direction:column;align-items:stretch;gap:2px;
    background:rgba(7,12,26,.97);border-bottom:1px solid var(--hair);padding:12px 18px 18px;
    display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:13px 12px;font-size:16px}
  .nav-cta{margin:8px 0 0;text-align:center}
  .nav-toggle{display:block}
}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:13px 26px;border-radius:12px;font-weight:700;font-size:15px;cursor:pointer;
  transition:.2s;border:1px solid transparent;
}
.btn-primary{color:#04101c;background:var(--grad);box-shadow:0 16px 40px -16px rgba(46,230,255,.7)}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.07)}
.btn-ghost{color:var(--text);border-color:var(--hair-strong);background:rgba(92,240,255,.04)}
.btn-ghost:hover{border-color:var(--cyan);background:rgba(92,240,255,.1)}
.btn .arrow{transition:.2s}
.btn:hover .arrow{transform:translateX(3px)}

/* ===== Hero ===== */
.hero{padding:96px 0 88px;position:relative;overflow:hidden}
.hero-halo{
  position:absolute;top:-180px;right:-120px;width:620px;height:620px;z-index:-1;
  background:radial-gradient(circle, rgba(46,230,255,.22), transparent 62%);
  filter:blur(20px);
}
.hero h1{font-size:clamp(34px,5.4vw,64px);letter-spacing:-.02em}
.hero .lead{font-size:clamp(16px,2vw,20px);margin-top:22px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:36px}
.hero-badges{display:flex;gap:26px;flex-wrap:wrap;margin-top:52px;color:var(--dim);font-size:13.5px}
.hero-badges b{color:var(--text);font-weight:700}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:40px}}

/* Hero 可视化面板 */
.hud-panel{
  position:relative;border:1px solid var(--hair);border-radius:22px;
  background:linear-gradient(160deg,rgba(20,34,72,.7),rgba(10,16,40,.5));
  padding:26px;box-shadow:var(--shadow);
  backdrop-filter:blur(6px);
}
.hud-panel::before{
  content:"";position:absolute;inset:0;border-radius:22px;padding:1px;
  background:linear-gradient(140deg,rgba(92,240,255,.5),transparent 40%,transparent 70%,rgba(138,123,255,.4));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;
}
.hud-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.hud-dots{display:flex;gap:7px}
.hud-dots i{width:10px;height:10px;border-radius:50%;background:var(--hair-strong)}
.hud-dots i:first-child{background:var(--cyan);box-shadow:0 0 8px var(--cyan)}
.hud-tag{font-size:11px;letter-spacing:.14em;color:var(--dim);text-transform:uppercase}
.hud-line{display:flex;gap:12px;align-items:flex-start;margin:14px 0}
.hud-ava{width:30px;height:30px;border-radius:9px;background:var(--grad-soft);border:1px solid var(--hair);flex:none;display:grid;place-items:center;font-size:14px}
.hud-bubble{background:rgba(9,15,35,.7);border:1px solid var(--hair);border-radius:12px;padding:10px 14px;font-size:13.5px;color:var(--text)}
.hud-bubble.me{background:rgba(46,230,255,.08);border-color:var(--hair-strong)}
.hud-run{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;color:var(--cyan);background:rgba(4,10,26,.8);border:1px solid var(--hair);border-radius:10px;padding:11px 14px;margin-top:8px}
.hud-run .ok{color:#5cf0b0}
.hud-run .mut{color:var(--dimmer)}

/* ===== 通用小节标题 ===== */
.head{max-width:720px;margin-bottom:52px}
.head.center{margin-left:auto;margin-right:auto;text-align:center}
.head h2{font-size:clamp(26px,3.6vw,40px);margin:16px 0 14px}

/* ===== 卡片网格 ===== */
.grid{display:grid;gap:20px}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:1000px){.g-4{grid-template-columns:repeat(2,1fr)}.g-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.g-2,.g-3,.g-4{grid-template-columns:1fr}}

.card{
  position:relative;border:1px solid var(--hair);border-radius:var(--r);
  background:var(--panel);padding:26px;transition:.22s;overflow:hidden;
}
.card:hover{transform:translateY(-4px);border-color:var(--hair-strong);box-shadow:var(--glow)}
.card .ic{
  width:48px;height:48px;border-radius:13px;display:grid;place-items:center;font-size:22px;margin-bottom:18px;
  background:var(--grad-soft);border:1px solid var(--hair);
}
.card h3{font-size:18px;margin-bottom:9px}
.card p{color:var(--dim);font-size:14.5px;margin:0}
.card .tag{position:absolute;top:18px;right:18px;font-size:11px;color:var(--dimmer);letter-spacing:.08em}

/* 特性大卡（左图标右文本，产品页用） */
.feat{display:flex;gap:18px;align-items:flex-start;border:1px solid var(--hair);border-radius:var(--r);background:var(--panel);padding:24px;transition:.22s}
.feat:hover{border-color:var(--hair-strong);box-shadow:var(--glow)}
.feat .ic{flex:none;width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:21px;background:var(--grad-soft);border:1px solid var(--hair)}
.feat h3{font-size:17px;margin-bottom:7px}
.feat p{color:var(--dim);font-size:14px;margin:0}

/* ===== 统计条 ===== */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;border:1px solid var(--hair);border-radius:var(--r);background:var(--panel);padding:34px 24px}
@media(max-width:720px){.stats{grid-template-columns:repeat(2,1fr);gap:26px}}
.stat{text-align:center}
.stat .n{font-size:clamp(28px,4vw,40px);font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.stat .l{color:var(--dim);font-size:13.5px;margin-top:10px}

/* ===== 分栏说明（图文） ===== */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split.rev .split-media{order:-1}
@media(max-width:860px){.split{grid-template-columns:1fr;gap:32px}.split.rev .split-media{order:0}}
.check{list-style:none;padding:0;margin:22px 0 0}
.check li{position:relative;padding:9px 0 9px 32px;color:var(--dim);border-bottom:1px solid rgba(92,240,255,.07)}
.check li:last-child{border-bottom:0}
.check li::before{content:"";position:absolute;left:0;top:15px;width:16px;height:16px;border-radius:5px;background:var(--grad);box-shadow:0 0 12px -2px var(--cyan)}
.check li b{color:var(--text)}

/* ===== 能力版图（架构） ===== */
.map{border:1px solid var(--hair);border-radius:22px;background:var(--panel);padding:30px;text-align:center}
.map .core{
  display:inline-flex;flex-direction:column;align-items:center;gap:4px;
  padding:22px 40px;border-radius:16px;background:var(--grad);color:#04101c;font-weight:800;
  box-shadow:0 20px 50px -18px rgba(46,230,255,.7);margin-bottom:8px;
}
.map .core small{font-weight:700;opacity:.75;font-size:12px;letter-spacing:.1em}
.map .spokes{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:26px}
@media(max-width:820px){.map .spokes{grid-template-columns:repeat(2,1fr)}}
.spoke{border:1px solid var(--hair);border-radius:12px;background:rgba(9,15,35,.6);padding:14px 10px;font-size:13px;color:var(--text);transition:.2s}
.spoke:hover{border-color:var(--hair-strong);color:var(--cyan)}
.spoke i{display:block;font-size:20px;margin-bottom:6px;font-style:normal}

/* ===== CTA 区 ===== */
.cta{
  border:1px solid var(--hair-strong);border-radius:26px;
  background:
    radial-gradient(600px 300px at 80% -20%,rgba(46,230,255,.2),transparent 60%),
    linear-gradient(160deg,rgba(20,34,72,.8),rgba(10,16,40,.7));
  padding:56px 48px;text-align:center;box-shadow:var(--shadow);
}
.cta h2{font-size:clamp(24px,3.4vw,36px);margin-bottom:16px}
.cta .lead{margin:0 auto 30px}
.cta .hero-actions{justify-content:center}
@media(max-width:640px){.cta{padding:40px 24px}}

/* ===== 页脚 ===== */
.footer{border-top:1px solid var(--hair);margin-top:20px;padding:56px 0 34px;background:rgba(6,10,22,.6)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
@media(max-width:820px){.footer-grid{grid-template-columns:1fr 1fr;gap:30px}}
@media(max-width:480px){.footer-grid{grid-template-columns:1fr}}
.footer h4{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);margin:0 0 16px;font-weight:700}
.footer a{display:block;color:var(--dim);font-size:14px;padding:5px 0;transition:.15s}
.footer a:hover{color:var(--cyan)}
.footer .brand{margin-bottom:14px}
.footer .about{color:var(--dim);font-size:13.5px;max-width:34ch;line-height:1.7}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;border-top:1px solid var(--hair);margin-top:40px;padding-top:24px;color:var(--dimmer);font-size:12.5px}
.footer-bottom a{display:inline;color:var(--dimmer)}
.footer-bottom a:hover{color:var(--dim)}

/* 页面顶部小标题区（内页 Hero） */
.page-hero{padding:72px 0 44px;position:relative;overflow:hidden}
.page-hero h1{font-size:clamp(30px,4.6vw,50px);margin:18px 0 18px}
.page-hero .lead{font-size:clamp(16px,1.8vw,19px)}

/* 进入动画 */
.reveal{opacity:0;transform:translateY(22px);transition:.7s cubic-bezier(.16,.8,.3,1)}
.reveal.in{opacity:1;transform:none}

/* 杂项 */
.pill-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}
.pill{border:1px solid var(--hair);border-radius:999px;padding:7px 15px;font-size:13px;color:var(--dim);background:rgba(92,240,255,.04)}
hr.sep{border:0;border-top:1px solid var(--hair);margin:0}