/* ============ 基础变量 ============ */
:root{
  --bg:#05070f;
  --bg-soft:#080c18;
  --panel:rgba(255,255,255,.045);
  --line:rgba(255,255,255,.09);
  --text:#e9eefb;
  --muted:#8d9ab5;
  --brand:#4d8dff;
  --brand-2:#8b5cf6;
  --cyan:#22d3ee;
  --gold:#f5c451;
  --radius:20px;
  --font:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{
  background:var(--bg);color:var(--text);
  font-family:var(--font);line-height:1.75;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
::selection{background:rgba(77,141,255,.35);color:#fff}
::-webkit-scrollbar{width:9px}
::-webkit-scrollbar-track{background:#04060c}
::-webkit-scrollbar-thumb{background:linear-gradient(#3b82f6,#8b5cf6);border-radius:9px}

.container{width:100%;max-width:1220px;margin:0 auto;padding:0 28px}
.grad-text{
  background:linear-gradient(100deg,#7dd3fc 0%,#6ea8ff 32%,#a78bfa 68%,#f0abfc 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.mono{font-family:var(--mono);font-size:.78em;letter-spacing:.14em;text-transform:uppercase}

/* ============ 顶部导航 ============ */
.header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  padding:20px 0;transition:padding .35s var(--ease),background .35s,border-color .35s;
  border-bottom:1px solid transparent;
}
.header.scrolled{
  padding:11px 0;background:rgba(5,7,15,.78);
  backdrop-filter:blur(20px) saturate(160%);
  -webkit-backdrop-filter:blur(20px) saturate(160%);
  border-bottom-color:var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{display:flex;align-items:center;gap:12px;font-weight:800;font-size:19px;letter-spacing:.02em}
.logo-img{
  width:40px;height:40px;flex:none;object-fit:contain;display:block;
  filter:drop-shadow(0 6px 16px rgba(59,130,246,.45));
  transition:transform .4s var(--ease);
}
.logo:hover .logo-img{transform:scale(1.07) rotate(-3deg)}
.logo small{display:block;font-size:13px;line-height:1.3;font-weight:700;letter-spacing:.19em;color:var(--muted);margin-top:-2px}
.nav-links{display:flex;align-items:center;gap:34px}
.nav-links a{font-size:15px;color:#c3cddf;position:relative;transition:color .25s}
.nav-links a::after{
  content:'';position:absolute;left:0;bottom:-6px;height:2px;width:0;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));transition:width .3s var(--ease);
}
.nav-links a:hover{color:#fff}
.nav-links a:hover::after{width:100%}
.nav-cta{display:flex;align-items:center;gap:14px}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.burger span{width:22px;height:2px;background:#dbe3f2;border-radius:2px;transition:.3s}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 28px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .3s var(--ease),box-shadow .3s,background .3s,border-color .3s;
  font-family:inherit;
}
.btn svg{width:16px;height:16px;transition:transform .3s var(--ease)}
.btn-primary{
  color:#fff;background:linear-gradient(115deg,#3b82f6,#6366f1 50%,#8b5cf6);
  box-shadow:0 14px 38px -14px rgba(99,102,241,.95);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 22px 46px -14px rgba(99,102,241,1)}
.btn-primary:hover svg{transform:translateX(4px)}
.btn-ghost{
  color:#dbe3f2;background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.14);
  backdrop-filter:blur(10px);
}
.btn-ghost:hover{transform:translateY(-3px);background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.28)}
.btn-sm{padding:11px 22px;font-size:14px}

/* ============ Hero ============ */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:180px 0 90px;overflow:hidden}
#hero-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:0}
.hero-orb{position:absolute;border-radius:50%;filter:blur(90px);pointer-events:none;z-index:0}
.orb-1{width:620px;height:620px;background:rgba(59,130,246,.28);top:-180px;left:-140px}
.orb-2{width:540px;height:540px;background:rgba(139,92,246,.22);top:60px;right:-160px}
.orb-3{width:420px;height:420px;background:rgba(34,211,238,.14);bottom:-180px;left:38%}
.hero-spot{
  position:absolute;inset:0;z-index:1;pointer-events:none;transition:opacity .5s;
  background:radial-gradient(560px circle at var(--sx,50%) var(--sy,40%),rgba(99,140,255,.13),transparent 62%);
}
.hero-grid{
  position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 34%,#000 0%,transparent 76%);
  -webkit-mask-image:radial-gradient(circle at 50% 34%,#000 0%,transparent 76%);
}
.hero-inner{position:relative;z-index:2;max-width:900px}
.pill{
  display:inline-flex;align-items:center;gap:10px;padding:8px 18px;border-radius:999px;
  background:rgba(255,255,255,.055);border:1px solid var(--line);
  font-size:13px;color:#b9c5da;backdrop-filter:blur(10px);
}
.pill .dot{width:6px;height:6px;border-radius:50%;background:#34d399;box-shadow:0 0 0 4px rgba(52,211,153,.18)}
.hero h1{
  font-size:clamp(36px,5.4vw,68px);line-height:1.14;font-weight:800;
  letter-spacing:-.02em;margin:26px 0 22px;
}
.hero p.lead{font-size:clamp(16px,1.55vw,19px);color:#a8b4cb;max-width:660px;line-height:1.9}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px;margin:38px 0 0}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px}
.tag{
  font-size:13px;color:#9fb0cc;padding:7px 15px;border-radius:999px;
  background:rgba(255,255,255,.035);border:1px solid rgba(255,255,255,.07);
}
/* 数指标 */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:78px;
  border-top:1px solid var(--line);padding-top:34px;
}
.metric{padding-right:26px;border-right:1px solid var(--line)}
.metric:last-child{border-right:0}
.metric .num{font-size:clamp(28px,3.2vw,42px);font-weight:800;letter-spacing:-.03em;
  background:linear-gradient(120deg,#dbeafe,#8ab4ff 50%,#c4b5fd);-webkit-background-clip:text;background-clip:text;color:transparent}
.metric .num i{font-style:normal;font-size:.5em;margin-left:2px;color:#8ab4ff;-webkit-text-fill-color:#8ab4ff}
.metric .lb{font-size:13.5px;color:var(--muted);margin-top:2px}

/* ============ 通用区块 ============ */
section{position:relative}
.section{padding:118px 0}
.sec-head{max-width:760px;margin-bottom:62px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;font-size:12.5px;font-weight:700;
  letter-spacing:.2em;text-transform:uppercase;color:#7f9bd4;margin-bottom:18px;
}
.eyebrow::before{content:'';width:26px;height:1px;background:linear-gradient(90deg,var(--brand),transparent)}
.sec-head.center .eyebrow::after{content:'';width:26px;height:1px;background:linear-gradient(270deg,var(--brand),transparent)}
h2.sec-title{font-size:clamp(27px,3.4vw,44px);font-weight:800;line-height:1.28;letter-spacing:-.02em}
/* 长标题降级：字数较多的主标题用小一号，避免整行过满 */
h2.sec-title.sec-title-sm{font-size:clamp(22px,2.5vw,32px);line-height:1.36}
.sec-desc{color:var(--muted);font-size:16.5px;margin-top:20px;line-height:1.9}
.divider-glow{height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.14),transparent)}

/* ============ 主营业务 ============ */
.services{background:linear-gradient(180deg,var(--bg) 0%,var(--bg-soft) 55%,var(--bg) 100%)}
.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{
  position:relative;padding:36px 30px 32px;border-radius:var(--radius);
  background:linear-gradient(165deg,rgba(255,255,255,.06),rgba(255,255,255,.018));
  border:1px solid var(--line);overflow:hidden;
  transition:transform .45s var(--ease),border-color .45s,box-shadow .45s;
}
.card::before{
  content:'';position:absolute;inset:0;opacity:0;transition:opacity .45s;pointer-events:none;
  background:radial-gradient(360px circle at var(--mx,50%) var(--my,0%),rgba(99,140,255,.16),transparent 62%);
}
.card::after{
  content:'';position:absolute;top:0;left:0;right:0;height:1.5px;opacity:0;transition:opacity .45s;
  background:linear-gradient(90deg,transparent,var(--brand),var(--brand-2),transparent);
}
.card:hover{transform:translateY(-9px);border-color:rgba(99,140,255,.42);box-shadow:0 34px 66px -32px rgba(59,130,246,.75)}
.card:hover::before{opacity:1}
.card:hover::after{opacity:1}
.card-ico{
  width:54px;height:54px;border-radius:15px;display:grid;place-items:center;margin-bottom:24px;
  background:linear-gradient(150deg,rgba(59,130,246,.24),rgba(139,92,246,.16));
  border:1px solid rgba(120,160,255,.28);color:#9dc0ff;
  transition:transform .45s var(--ease),color .35s,border-color .35s;
}
.card:hover .card-ico{transform:translateY(-3px) scale(1.06);color:#c9dcff;border-color:rgba(120,160,255,.5)}
.card-ico svg{width:26px;height:26px}
.card h3{font-size:20px;font-weight:700;margin-bottom:12px;letter-spacing:-.01em}
.card p{color:var(--muted);font-size:14.6px;line-height:1.85;min-height:78px}
.card .tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:20px;padding-top:20px;border-top:1px solid rgba(255,255,255,.07)}
.card .tags span{font-size:12px;color:#93a8cc;background:rgba(255,255,255,.045);padding:4px 11px;border-radius:7px}
.svc-no{position:absolute;top:26px;right:28px;font-family:var(--mono);font-size:12px;color:rgba(255,255,255,.2);letter-spacing:.1em}

/* ============ 行业解决方案 ============ */
.tabs{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-bottom:46px}
.tab{
  padding:12px 26px;border-radius:999px;font-size:15px;font-weight:600;color:#a9b7ce;
  background:rgba(255,255,255,.04);border:1px solid var(--line);cursor:pointer;
  font-family:inherit;transition:.32s var(--ease);
}
.tab:hover{color:#fff;background:rgba(255,255,255,.08)}
.tab.active{
  color:#fff;border-color:transparent;
  background:linear-gradient(115deg,#3b82f6,#8b5cf6);
  box-shadow:0 14px 34px -14px rgba(99,102,241,.95);
}
.panel{display:none;animation:fadeUp .55s var(--ease)}
.panel.active{display:block}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.panel-inner{
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
  padding:48px;border-radius:26px;
  background:linear-gradient(150deg,rgba(255,255,255,.055),rgba(255,255,255,.015));
  border:1px solid var(--line);
}
.panel-inner h3{font-size:29px;font-weight:800;margin-bottom:16px;letter-spacing:-.02em}
.panel-inner>div>p{color:var(--muted);font-size:15.6px;line-height:1.9}
.feat-list{list-style:none;margin-top:26px;display:grid;gap:14px}
.feat-list li{display:flex;gap:12px;font-size:15px;color:#c2cee2}
.feat-list .ck{
  width:20px;height:20px;border-radius:50%;flex:none;margin-top:4px;display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(59,130,246,.35),rgba(139,92,246,.3));
  border:1px solid rgba(120,160,255,.4);
}
.feat-list .ck svg{width:11px;height:11px;color:#cfe0ff}
.kpi-stack{display:grid;gap:16px}
.kpi{
  padding:24px 26px;border-radius:16px;background:rgba(255,255,255,.04);
  border:1px solid var(--line);display:flex;align-items:center;gap:20px;
  transition:.4s var(--ease);
}
.kpi:hover{transform:translateX(6px);border-color:rgba(99,140,255,.42);background:rgba(255,255,255,.065)}
.kpi .big{font-size:30px;font-weight:800;letter-spacing:-.03em;min-width:118px;
  background:linear-gradient(120deg,#bfdbfe,#a78bfa);-webkit-background-clip:text;background-clip:text;color:transparent}
.kpi .cap{font-size:14px;color:var(--muted);line-height:1.6}

/* ============ 技术能力 ============ */
.tech{background:linear-gradient(180deg,var(--bg),#070a14 60%,var(--bg))}
.marquee{position:relative;overflow:hidden;padding:9px 0;
  mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent)}
.marquee-track{display:flex;gap:14px;width:max-content;animation:slideL 42s linear infinite}
.marquee-track.rev{animation:slideR 46s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes slideL{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@keyframes slideR{from{transform:translateX(-50%)}to{transform:translateX(0)}}
.chip{
  padding:13px 26px;border-radius:13px;font-size:15px;color:#b6c4db;white-space:nowrap;
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  transition:.3s;font-family:var(--mono);letter-spacing:.02em;
}
.chip:hover{color:#fff;border-color:rgba(99,140,255,.5);background:rgba(99,140,255,.1)}
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:66px}
.adv{padding:30px 26px;border-radius:16px;border:1px solid var(--line);background:rgba(255,255,255,.03);
  transition:.4s var(--ease)}
.adv:hover{transform:translateY(-6px);background:rgba(255,255,255,.06);border-color:rgba(99,140,255,.38)}
.adv .n{font-family:var(--mono);font-size:12px;color:#6d8cc4;letter-spacing:.16em}
.adv h4{font-size:17px;font-weight:700;margin:14px 0 10px}
.adv p{font-size:14.2px;color:var(--muted);line-height:1.8}

/* ============ 开发流程 ============ */
.process-track{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.process-track::before{
  content:'';position:absolute;top:27px;left:6%;right:6%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(99,140,255,.55),rgba(139,92,246,.55),transparent);
}
.step{position:relative;text-align:center;padding-top:0}
.step .ball{
  width:54px;height:54px;margin:0 auto 22px;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(150deg,#0d1426,#121a30);border:1px solid rgba(120,160,255,.32);
  font-weight:800;font-size:16px;color:#9dc0ff;position:relative;z-index:2;
  box-shadow:0 0 0 8px rgba(5,7,15,1);
  transition:.4s var(--ease);
}
.step:hover .ball{
  background:linear-gradient(150deg,#3b82f6,#8b5cf6);color:#fff;border-color:transparent;
  transform:scale(1.08);box-shadow:0 0 0 8px rgba(5,7,15,1),0 16px 34px -12px rgba(99,102,241,1);
}
.step h4{font-size:16.5px;font-weight:700;margin-bottom:9px}
.step p{font-size:13.8px;color:var(--muted);line-height:1.8;padding:0 6px}

/* ============ 案例 ============ */
.cases{background:linear-gradient(180deg,var(--bg),var(--bg-soft))}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case{
  padding:34px 30px;border-radius:var(--radius);border:1px solid var(--line);
  background:linear-gradient(165deg,rgba(255,255,255,.055),rgba(255,255,255,.015));
  transition:.45s var(--ease);position:relative;overflow:hidden;
}
.case:hover{transform:translateY(-8px);border-color:rgba(99,140,255,.4);box-shadow:0 34px 64px -32px rgba(59,130,246,.7)}
.case .cat{font-size:12.5px;color:#7f9bd4;letter-spacing:.14em;text-transform:uppercase;font-weight:700}
.case h3{font-size:19px;font-weight:700;margin:14px 0 12px;line-height:1.5}
.case p{font-size:14.4px;color:var(--muted);line-height:1.85}
.case .kpi-line{
  margin-top:24px;padding-top:20px;border-top:1px solid rgba(255,255,255,.07);
  display:flex;align-items:baseline;gap:10px;
}
.case .kpi-line b{font-size:30px;font-weight:800;letter-spacing:-.03em;
  background:linear-gradient(120deg,#bfdbfe,#a78bfa);-webkit-background-clip:text;background-clip:text;color:transparent}
.case .kpi-line span{font-size:13.4px;color:var(--muted)}

/* ============ 评价 ============ */
.quote-band{
  padding:56px 52px;border-radius:26px;text-align:center;position:relative;overflow:hidden;
  background:linear-gradient(140deg,rgba(59,130,246,.13),rgba(139,92,246,.09));
  border:1px solid rgba(120,160,255,.2);
}
.quote-band::after{
  content:'';position:absolute;width:420px;height:420px;border-radius:50%;
  background:rgba(99,140,255,.2);filter:blur(100px);top:-160px;right:-90px;
}
.quote-band blockquote{font-size:clamp(18px,2.1vw,25px);line-height:1.75;font-weight:600;max-width:840px;margin:0 auto;position:relative;z-index:1}
.quote-band .who{margin-top:24px;font-size:14px;color:var(--muted);position:relative;z-index:1}

/* ============ 常见问题 ============ */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:46px}
.faq-item{
  background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:26px 28px;
}
.faq-item h3{font-size:17px;font-weight:600;color:var(--text);line-height:1.6;margin-bottom:10px}
.faq-item h3::before{content:"Q ";color:var(--brand);font-weight:700;margin-right:2px}
.faq-item p{font-size:14.5px;color:var(--muted);line-height:1.85}
@media (max-width:860px){
  .faq-grid{grid-template-columns:1fr;gap:14px;margin-top:32px}
  .faq-item{padding:22px 20px}
}

/* ============ 联系 ============ */
.contact{background:linear-gradient(180deg,var(--bg-soft),#04060c)}
.contact-wrap{display:grid;grid-template-columns:1fr 1.05fr;gap:60px;align-items:start}
.contact-info h2{font-size:clamp(26px,3.2vw,40px);font-weight:800;line-height:1.3;letter-spacing:-.02em}
.contact-info>p{color:var(--muted);margin-top:18px;font-size:16px;line-height:1.9}
.info-list{list-style:none;margin-top:38px;display:grid;gap:18px}
.info-list li{display:flex;gap:16px;align-items:flex-start}
.info-list .ib{
  width:44px;height:44px;border-radius:13px;flex:none;display:grid;place-items:center;color:#9dc0ff;
  background:rgba(99,140,255,.11);border:1px solid rgba(120,160,255,.25);
}
.info-list .ib svg{width:19px;height:19px}
.info-list b{display:block;font-size:15px;font-weight:600}
.info-list span{font-size:14px;color:var(--muted)}
.info-list a{color:#c2cee2;text-decoration:none;border-bottom:1px dashed rgba(255,255,255,.22);transition:color .25s,border-color .25s}
.info-list a:hover{color:#8ab4ff;border-bottom-color:rgba(138,180,255,.65)}
.form-card{
  padding:40px;border-radius:24px;border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  backdrop-filter:blur(14px);
}
.form-card h3{font-size:21px;font-weight:700;margin-bottom:8px}
.form-card>p{font-size:14px;color:var(--muted);margin-bottom:28px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;color:#a6b3ca;margin-bottom:8px;font-weight:600}
.field input,.field select,.field textarea{
  width:100%;padding:14px 16px;border-radius:12px;font-size:15px;font-family:inherit;
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.11);color:var(--text);
  transition:.28s;outline:none;
}
.field textarea{resize:vertical;min-height:104px}
.field input::placeholder,.field textarea::placeholder{color:#63718c}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:rgba(99,140,255,.7);background:rgba(99,140,255,.07);
  box-shadow:0 0 0 4px rgba(99,140,255,.12);
}
.field select option{background:#0b1120;color:#e9eefb}
.row-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-note{font-size:12.5px;color:#6b7893;margin-top:16px;text-align:center}
.toast{
  margin-top:16px;padding:14px 18px;border-radius:12px;font-size:14px;display:none;
  background:rgba(52,211,153,.1);border:1px solid rgba(52,211,153,.35);color:#8be8bd;
}
.toast.show{display:block;animation:fadeUp .45s var(--ease)}
.toast.err{background:rgba(248,113,113,.1);border-color:rgba(248,113,113,.4);color:#fca5a5}
/* 蜜罐字段：正常人看不见，机器人会填 */
.hp-field{position:absolute!important;left:-9999em;width:1px;height:1px;overflow:hidden}

/* ============ 页脚 ============ */
footer{border-top:1px solid var(--line);padding:64px 0 34px;background:#04060c}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:44px}
.foot-brand p{color:var(--muted);font-size:14.2px;line-height:1.9;margin-top:18px;max-width:320px}
.foot-col h5{font-size:13.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#8fa2c2;margin-bottom:18px}
.foot-col a{display:block;font-size:14.2px;color:var(--muted);margin-bottom:11px;transition:.25s}
.foot-col a:hover{color:#fff;transform:translateX(3px)}
.foot-bottom{
  margin-top:52px;padding-top:26px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:13px;color:#65728b;
}
/* 友情链接 */
.foot-links{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 24px;
  margin-top:40px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13.5px;color:#65728b;line-height:1.9;
}
.foot-links b{font-weight:600;color:#8fa2c2;letter-spacing:.02em}
.foot-links a{color:#7f8ea8;transition:color .25s var(--ease)}
.foot-links a:hover{color:#fff}

/* ============ 滚动动画 ============ */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .85s var(--ease),transform .85s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media(max-width:1080px){
  .svc-grid,.adv-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:1fr}
  .panel-inner{grid-template-columns:1fr;gap:36px;padding:38px}
  .contact-wrap{grid-template-columns:1fr;gap:44px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:36px}
  .metrics{grid-template-columns:repeat(2,1fr);gap:26px}
  .metric:nth-child(2){border-right:0}
  .metric{border-right:0}
}
@media(max-width:860px){
  .nav-links{
    position:fixed;top:0;right:0;bottom:0;width:min(320px,84vw);z-index:110;
    flex-direction:column;align-items:flex-start;justify-content:center;gap:26px;
    padding:0 40px;background:rgba(6,9,18,.98);backdrop-filter:blur(22px);
    border-left:1px solid var(--line);
    transform:translateX(102%);transition:transform .45s var(--ease);
  }
  .nav-links.open{transform:none}
  .nav-links a{font-size:18px}
  .burger{display:flex;position:relative;z-index:130}
  .nav-cta .btn{display:none}
  .process-track{grid-template-columns:1fr;gap:34px}
  .process-track::before{display:none}
  .step{text-align:left;display:flex;gap:20px;align-items:flex-start}
  .step .ball{margin:0;box-shadow:none;flex:none}
  .card p{min-height:auto}
}
@media(max-width:640px){
  .container{padding:0 20px}
  .section{padding:82px 0}
  .hero{padding:140px 0 70px}
  .svc-grid,.adv-grid{grid-template-columns:1fr}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .panel-inner{padding:28px 22px}
  .quote-band{padding:38px 24px}
  .form-card{padding:28px 22px}
  .row-2{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .brand-name{display:none}
}

/* ============ 右侧悬浮联系条 ============ */
.float-bar{
  --qr:200px;
  position:fixed;right:20px;top:50%;transform:translateY(-50%);z-index:110;
  display:flex;flex-direction:column;gap:10px;
}
.float-btn{
  width:52px;height:52px;border-radius:15px;flex:none;
  background:rgba(255,255,255,.06);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  display:grid;place-items:center;color:#cfe0ff;cursor:pointer;
  box-shadow:0 12px 32px -12px rgba(0,0,0,.65);
  transition:.3s var(--ease);font-family:inherit;padding:0;
}
.float-btn svg{width:24px;height:24px}
.float-btn:hover{
  color:#fff;border-color:transparent;transform:translateX(-4px);
  background:linear-gradient(135deg,#3b82f6,#8b5cf6);
  box-shadow:0 14px 34px -10px rgba(99,102,241,.75);
}
.float-item{position:relative}
.qr-pop{
  position:absolute;right:calc(100% + 14px);top:50%;
  transform:translateY(-50%) translateX(10px);
  width:calc(var(--qr) + 28px);padding:14px 14px 12px;border-radius:18px;
  background:#fff;color:#1c2333;text-align:center;
  box-shadow:0 24px 60px -18px rgba(0,0,0,.75);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:.32s var(--ease);
}
.qr-pop::after{
  content:'';position:absolute;left:100%;top:50%;transform:translateY(-50%);
  border:7px solid transparent;border-left-color:#fff;
}
.qr-pop img{width:var(--qr);height:var(--qr);object-fit:contain;display:block;margin:0 auto;border-radius:12px}
.qr-pop b{display:block;font-size:14.5px;margin-top:10px}
.qr-pop span{display:block;font-size:12.5px;color:#5c6780;margin-top:3px}
@media (hover:hover){
  .float-item:hover .qr-pop{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(-50%) translateX(0)}
}
.float-item.open .qr-pop{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(-50%) translateX(0)}
@media (max-width:360px){
  /* 200px 弹层（总宽 228）+ 右侧占位 68 = 296，360px 以上屏均放得下；
     仅在更窄的屏上按 62vw 收缩兜底（320px 屏 → 198px，几乎无感） */
  .float-bar{--qr:min(62vw,200px)}
}
@media (max-width:640px){
  .float-bar{right:12px}
  .float-btn{width:46px;height:46px;border-radius:13px}
  .float-btn svg{width:21px;height:21px}
  .qr-pop{right:calc(100% + 10px)}
}