/* ============================================================
   繁星GEO优化系统 - AI 科技感主题 v3
   深空渐变 · 玻璃拟态 · 霓虹光效 · 网格粒子
   ============================================================ */
:root{
  --bg:#060a14;
  --bg2:#0a1120;
  --panel:rgba(255,255,255,.04);
  --panel-border:rgba(255,255,255,.09);
  --card:#0d1526;
  --card-border:rgba(255,255,255,.08);
  --txt:#e6edf7;
  --txt2:#94a3b8;
  --txt3:#64748b;
  --primary:#3b82f6;
  --primary2:#6366f1;
  --violet:#8b5cf6;
  --cyan:#22d3ee;
  --lime:#22c55e;
  --amber:#f59e0b;
  --rose:#f43f5e;
  --grad:linear-gradient(135deg,#3b82f6,#6366f1 55%,#8b5cf6);
  --grad-text:linear-gradient(90deg,#60a5fa,#a78bfa 60%,#e879f9);
  --shadow:0 20px 60px rgba(0,0,0,.5);
  --glow-blue:0 0 40px rgba(59,130,246,.35);
  --glow-violet:0 0 40px rgba(139,92,246,.35);
  --radius:16px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei",-apple-system,Segoe UI,sans-serif;
  color:var(--txt);line-height:1.75;background:var(--bg);overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* ===== 全局背景: 深空 + 网格 + 光晕 ===== */
body::before{
  content:"";position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(1100px 600px at 85% -10%,rgba(99,102,241,.16),transparent 55%),
    radial-gradient(900px 500px at -10% 30%,rgba(59,130,246,.12),transparent 55%),
    radial-gradient(700px 500px at 60% 110%,rgba(139,92,246,.10),transparent 55%),
    linear-gradient(160deg,#060a14 0%,#0a1120 50%,#070b16 100%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:60px 60px;
  mask-image:radial-gradient(ellipse at center,black 30%,transparent 80%);
}

/* ===== 顶部条 ===== */
.topbar{background:rgba(6,10,20,.6);backdrop-filter:blur(12px);border-bottom:1px solid var(--panel-border);color:var(--txt2);font-size:13px;padding:8px 0;position:relative;z-index:60}
.topbar .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:6px}
.topbar-right{display:flex;gap:22px}
.topbar-right span{display:flex;align-items:center;gap:7px}
.topbar-right b{color:var(--cyan);font-weight:600}
.hide-sm{display:inline}

/* ===== 导航 ===== */
.header{position:sticky;top:0;z-index:100;background:rgba(6,10,20,.72);backdrop-filter:blur(18px);border-bottom:1px solid var(--panel-border);box-shadow:0 10px 40px rgba(0,0,0,.4)}
.header .container{display:flex;justify-content:space-between;align-items:center;height:76px}
.logo a{display:flex;align-items:center;gap:12px;font-size:22px;font-weight:800;color:#fff;letter-spacing:.5px}
.logo-icon{
  width:42px;height:42px;position:relative;border-radius:12px;
  background:var(--grad);display:flex;align-items:center;justify-content:center;
  font-size:20px;color:#fff;box-shadow:var(--glow-blue),0 6px 20px rgba(99,102,241,.4);
}
.logo-icon::after{content:"";position:absolute;inset:-2px;border-radius:14px;background:linear-gradient(135deg,#60a5fa,#a78bfa);filter:blur(12px);opacity:.5;z-index:-1}
.logo-text{background:linear-gradient(90deg,#7dd3fc,#a5b4fc,#c4b5fd);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.nav{display:flex;gap:4px;align-items:center}
.nav a{padding:10px 16px;font-size:14.5px;font-weight:500;border-radius:10px;color:var(--txt2);transition:.22s;position:relative}
.nav a:hover{color:#fff;background:var(--panel)}
.nav a.active{
  color:#fff;font-weight:600;
  background:linear-gradient(135deg,rgba(59,130,246,.25),rgba(139,92,246,.25));
  box-shadow:inset 0 0 0 1px rgba(99,102,241,.4),0 0 24px rgba(99,102,241,.25);
}
.nav-toggle{display:none;font-size:26px;cursor:pointer;color:#fff}

/* ===== 页头横幅(内页) ===== */
.page-banner{position:relative;color:#fff;padding:72px 0;text-align:center;overflow:hidden;background:transparent}
.page-banner::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(600px 300px at 30% 0%,rgba(59,130,246,.3),transparent 60%),
    radial-gradient(500px 300px at 80% 100%,rgba(139,92,246,.25),transparent 60%);
}
.page-banner h1{font-size:38px;margin-bottom:12px;font-weight:800;letter-spacing:.5px;position:relative;z-index:1;text-shadow:0 4px 30px rgba(99,102,241,.4)}
.page-banner .crumb{font-size:14px;opacity:.8;position:relative;z-index:1}
.page-banner .crumb span{opacity:.6;margin:0 4px}

/* ===== 区块 ===== */
.section{padding:96px 0;position:relative}
.section-alt{background:linear-gradient(180deg,rgba(255,255,255,.02),rgba(255,255,255,.04))}
.sec-head{text-align:center;max-width:780px;margin:0 auto 52px}
.sec-head .tag{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;padding:6px 18px;border-radius:30px;
  background:rgba(99,102,241,.12);border:1px solid rgba(139,92,246,.3);color:#a5b4fc;
  margin-bottom:16px;font-weight:600;letter-spacing:2px;text-transform:uppercase;
}
.sec-head .tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
.sec-head h2{font-size:36px;margin-bottom:14px;font-weight:800;line-height:1.3;color:#fff}
.sec-head h2 em{font-style:normal;background:var(--grad-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.sec-head p{color:var(--txt2);font-size:16px}

/* ===== Hero ===== */
.hero{position:relative;color:#fff;padding:110px 0 90px;overflow:hidden}
.hero::before{
  content:"";position:absolute;top:-120px;left:50%;transform:translateX(-50%);
  width:900px;height:520px;border-radius:50%;
  background:radial-gradient(ellipse at center,rgba(99,102,241,.28),transparent 65%);
  filter:blur(10px);pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.6;
  background-image:radial-gradient(rgba(255,255,255,.14) 1px,transparent 1px);
  background-size:28px 28px;
  mask-image:radial-gradient(ellipse at 70% 30%,black 20%,transparent 70%);
}
.hero .container{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center;position:relative;z-index:2}
.hero-badge{
  display:inline-flex;align-items:center;gap:10px;margin-bottom:26px;font-size:13px;
  background:rgba(255,255,255,.05);border:1px solid var(--panel-border);padding:8px 18px;border-radius:30px;
  color:var(--txt2);backdrop-filter:blur(6px);
}
.hero-badge .dot{width:8px;height:8px;background:var(--cyan);border-radius:50%;box-shadow:0 0 12px var(--cyan);animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.hero h1{font-size:50px;line-height:1.22;margin-bottom:22px;font-weight:900;letter-spacing:.5px}
.hero h1 .g1{background:var(--grad-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero h1 .g2{background:linear-gradient(90deg,#fbbf24,#fb923c);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero p{font-size:17px;opacity:.85;margin-bottom:34px;max-width:560px;color:var(--txt2)}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{display:flex;gap:40px;margin:42px 0 0;flex-wrap:wrap}
.hero-stats div{position:relative}
.hero-stats b{display:block;font-size:32px;color:#fff;font-weight:900;line-height:1.2;background:var(--grad-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-stats span{font-size:13px;opacity:.7;color:var(--txt2)}

/* Hero 右侧面板 - 玻璃拟态 */
.hero-panel{
  position:relative;border-radius:20px;padding:32px;
  background:rgba(255,255,255,.05);border:1px solid var(--panel-border);
  backdrop-filter:blur(16px);box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.08);
  overflow:hidden;
}
.hero-panel::before{
  content:"";position:absolute;top:-1px;left:10%;right:10%;height:1px;
  background:linear-gradient(90deg,transparent,#60a5fa,transparent);
}
.hero-panel h3{font-size:18px;margin-bottom:20px;display:flex;align-items:center;gap:9px;color:#fff}
.hero-panel ul{list-style:none}
.hero-panel li{padding:12px 0;border-bottom:1px solid var(--panel-border);font-size:14.5px;display:flex;align-items:center;gap:11px;color:var(--txt)}
.hero-panel li::before{content:"";width:8px;height:8px;border-radius:2px;background:linear-gradient(135deg,#22d3ee,#8b5cf6);box-shadow:0 0 10px rgba(34,211,238,.6);flex-shrink:0;transform:rotate(45deg)}
.hero-panel li:last-child{border-bottom:none}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 34px;border-radius:12px;font-weight:700;font-size:15px;transition:.25s;cursor:pointer;border:none;gap:9px;letter-spacing:.3px;position:relative;overflow:hidden}
.btn-white{background:#fff;color:#0b1120;box-shadow:0 8px 30px rgba(0,0,0,.35)}
.btn-white:hover{transform:translateY(-3px);box-shadow:0 14px 40px rgba(0,0,0,.45)}
.btn-outline{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.35)}
.btn-outline:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.6)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:var(--glow-blue),0 10px 30px rgba(99,102,241,.4)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:var(--glow-violet),0 16px 40px rgba(99,102,241,.5)}
.btn-glow{background:linear-gradient(135deg,#06b6d4,#6366f1,#8b5cf6);color:#fff;box-shadow:0 10px 35px rgba(99,102,241,.5)}

/* ===== 特性卡片 ===== */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.feat{
  position:relative;background:var(--panel);border:1px solid var(--panel-border);border-radius:var(--radius);
  padding:34px 28px;transition:.35s;overflow:hidden;backdrop-filter:blur(10px);
}
.feat::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:.35s;box-shadow:0 0 20px rgba(99,102,241,.6)}
.feat::after{content:"";position:absolute;top:-1px;right:15%;width:60%;height:2px;background:linear-gradient(90deg,transparent,rgba(34,211,238,.7),transparent);opacity:0;transition:.4s}
.feat:hover{transform:translateY(-10px);border-color:rgba(99,102,241,.4);box-shadow:var(--shadow),var(--glow-blue);background:rgba(255,255,255,.06)}
.feat:hover::before{transform:scaleX(1)}
.feat:hover::after{opacity:1}
.feat .ico{
  width:62px;height:62px;border-radius:16px;margin-bottom:22px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(59,130,246,.2),rgba(139,92,246,.2));border:1px solid rgba(139,92,246,.3);
  font-size:28px;box-shadow:inset 0 1px 0 rgba(255,255,255,.1);transition:.3s;
}
.feat:hover .ico{box-shadow:0 0 30px rgba(99,102,241,.5)}
.feat h3{font-size:19px;margin-bottom:10px;font-weight:700;color:#fff}
.feat p{color:var(--txt2);font-size:14.5px}

/* ===== 流程 ===== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;position:relative}
.steps::before{content:"";position:absolute;top:27px;left:12%;right:12%;height:1px;background:linear-gradient(90deg,transparent,rgba(99,102,241,.5),transparent)}
.step{text-align:center;padding:0 12px;position:relative}
.step .num{
  width:56px;height:56px;border-radius:50%;margin:0 auto 20px;display:flex;align-items:center;justify-content:center;
  font-size:21px;font-weight:900;color:#fff;position:relative;z-index:1;
  background:linear-gradient(135deg,#1e293b,#0f172a);border:1px solid rgba(99,102,241,.5);
  box-shadow:0 0 24px rgba(99,102,241,.25);
}
.step:hover .num{box-shadow:0 0 40px rgba(99,102,241,.5)}
.step h4{margin-bottom:8px;font-size:17px;color:#fff}
.step p{color:var(--txt2);font-size:14px}

/* ===== 合作卡片 ===== */
.model-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.model-grid.three{grid-template-columns:repeat(3,1fr)}
.m-card{
  position:relative;background:var(--card);border:1px solid var(--card-border);border-radius:18px;
  overflow:hidden;display:flex;flex-direction:column;transition:.35s;
}
.m-card:hover{transform:translateY(-10px);box-shadow:var(--shadow);border-color:rgba(99,102,241,.4)}
.m-card.hot{border:1px solid rgba(99,102,241,.5);box-shadow:0 0 40px rgba(99,102,241,.15)}
.m-head{padding:30px 26px;text-align:center;background:linear-gradient(180deg,rgba(255,255,255,.05),transparent)}
.m-card.hot .m-head{background:linear-gradient(135deg,rgba(99,102,241,.18),rgba(59,130,246,.08))}
.m-head .m-cat{font-size:12px;color:var(--cyan);margin-bottom:8px;letter-spacing:2px;text-transform:uppercase;font-weight:600}
.m-head h3{font-size:21px;margin-bottom:10px;font-weight:800;color:#fff}
.m-head .price{font-size:30px;font-weight:900;color:#fff;background:var(--grad-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.m-card.hot .m-head .price{background:linear-gradient(90deg,#fbbf24,#fb923c);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.m-body{padding:26px;flex:1}
.m-body ul{list-style:none}
.m-body li{padding:10px 0;font-size:14.5px;color:var(--txt);border-bottom:1px dashed rgba(255,255,255,.08);display:flex;gap:10px;align-items:center}
.m-body li::before{content:"✓";color:var(--lime);font-weight:700;flex-shrink:0;text-shadow:0 0 8px rgba(34,197,94,.5)}
.m-foot{padding:0 26px 30px;text-align:center}
.hot-badge{position:absolute;top:16px;right:16px;background:linear-gradient(135deg,#f59e0b,#fb923c);color:#fff;font-size:12px;padding:4px 14px;border-radius:16px;z-index:2;font-weight:700;box-shadow:0 4px 16px rgba(245,158,11,.5)}

/* ===== 案例 ===== */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.case{position:relative;background:var(--card);border:1px solid var(--card-border);border-radius:16px;overflow:hidden;transition:.35s}
.case:hover{transform:translateY(-8px);border-color:rgba(99,102,241,.4);box-shadow:var(--shadow)}
.case .c-cover{height:170px;display:flex;align-items:center;justify-content:center;font-size:46px;position:relative;overflow:hidden;background:linear-gradient(135deg,rgba(59,130,246,.2),rgba(139,92,246,.2))}
.case .c-cover::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 50% 50%,rgba(255,255,255,.15),transparent 60%)}
.case .c-body{padding:24px}
.case .c-body h3{font-size:17px;margin-bottom:6px;color:#fff}
.case .c-body .c-client{color:var(--txt2);font-size:13px}
.result-tag{display:inline-block;background:rgba(34,197,94,.12);border:1px solid rgba(34,197,94,.3);color:#4ade80;font-size:13px;padding:5px 14px;border-radius:20px;margin-top:12px;font-weight:600}

/* ===== 价格表 ===== */
.price-table{width:100%;border-collapse:collapse;background:var(--card);border-radius:14px;overflow:hidden;border:1px solid var(--card-border)}
.price-table th,.price-table td{padding:18px 20px;text-align:center;border-bottom:1px solid rgba(255,255,255,.06)}
.price-table th{background:linear-gradient(135deg,rgba(99,102,241,.2),rgba(59,130,246,.1));color:#fff;font-size:15px}
.price-table td{font-size:14.5px;color:var(--txt)}
.price-table tr:hover td{background:rgba(255,255,255,.03)}
.price-table .price{font-size:24px;font-weight:800;color:#fff;background:var(--grad-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent}

/* ===== 资讯 ===== */
.news-list{max-width:900px;margin:0 auto}
.news-item{display:flex;gap:24px;background:var(--card);border:1px solid var(--card-border);border-radius:14px;padding:24px;margin-bottom:18px;transition:.25s}
.news-item:hover{border-color:rgba(99,102,241,.5);box-shadow:var(--glow-blue);transform:translateY(-4px);background:rgba(255,255,255,.05)}
.news-item .n-date{min-width:92px;text-align:center;border-radius:12px;padding:14px 8px;align-self:center;background:linear-gradient(135deg,rgba(59,130,246,.18),rgba(139,92,246,.18));border:1px solid rgba(99,102,241,.3)}
.news-item .n-date b{display:block;font-size:26px;color:#fff;font-weight:800}
.news-item .n-date span{font-size:12px;color:var(--txt2)}
.news-item h3{font-size:18px;margin-bottom:8px;color:#fff;transition:.2s}
.news-item:hover h3{background:var(--grad-text);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.news-item p{color:var(--txt2);font-size:13.5px}
.news-item .n-more{color:#a5b4fc;font-size:13px;font-weight:600}

/* ===== 文章详情 ===== */
.article{max-width:840px;margin:0 auto;background:var(--card);border-radius:18px;padding:44px;box-shadow:var(--shadow);border:1px solid var(--card-border)}
.article .a-title{font-size:30px;margin-bottom:14px;line-height:1.4;font-weight:800;color:#fff}
.article .a-meta{color:var(--txt2);font-size:13.5px;border-bottom:1px solid rgba(255,255,255,.08);padding-bottom:18px;margin-bottom:26px;display:flex;gap:18px;flex-wrap:wrap}
.article .a-content{font-size:16.5px;line-height:2;color:var(--txt)}
.article .a-content h2{font-size:24px;margin:30px 0 14px;padding-left:14px;border-left:4px solid var(--primary2);color:#fff}
.article .a-content h3{font-size:20px;margin:24px 0 12px;color:#fff}
.article .a-content p{margin-bottom:16px;color:var(--txt)}
.article .a-content b{color:#a5b4fc}
.article .a-content img{border-radius:10px;margin:18px 0;border:1px solid var(--card-border)}

/* ===== 联系页 ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:start}
.c-info h3{font-size:28px;margin-bottom:16px;font-weight:800;color:#fff}
.c-info>p{color:var(--txt2);margin-bottom:26px}
.c-info .ci{display:flex;align-items:center;gap:15px;margin-bottom:18px;font-size:15.5px;background:var(--panel);border:1px solid var(--panel-border);border-radius:14px;padding:18px;transition:.2s;color:var(--txt)}
.c-info .ci:hover{border-color:rgba(99,102,241,.5);box-shadow:var(--glow-blue);transform:translateX(4px)}
.c-info .ci i{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-style:normal;color:#fff;font-size:20px;flex-shrink:0;background:var(--grad);box-shadow:var(--glow-blue)}
.form{background:var(--card);border:1px solid var(--card-border);border-radius:18px;padding:34px;box-shadow:var(--shadow)}
.form label{font-size:13.5px;font-weight:600;display:block;margin-bottom:6px;color:#cbd5e1}
.form input,.form select,.form textarea{width:100%;padding:13px 14px;border:1px solid var(--card-border);border-radius:10px;font-size:14.5px;margin-bottom:18px;font-family:inherit;transition:.2s;background:rgba(255,255,255,.05);color:#fff}
.form input::placeholder,.form textarea::placeholder{color:var(--txt3)}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--primary);background:rgba(255,255,255,.08);box-shadow:0 0 0 3px rgba(99,102,241,.2)}
.form .btn{width:100%}
.form-tip{background:rgba(34,197,94,.12);border:1px solid rgba(34,197,94,.3);color:#4ade80;border-radius:10px;padding:12px 16px;font-size:14px;margin-bottom:16px;display:none}

/* ===== 分页 ===== */
.pagination{display:flex;justify-content:center;gap:8px;margin-top:32px}
.pagination a,.pagination span{padding:9px 15px;border:1px solid var(--card-border);border-radius:9px;font-size:14px;background:var(--card);color:var(--txt2)}
.pagination .active{background:var(--grad);color:#fff;border-color:transparent;box-shadow:var(--glow-blue)}
.pagination a:hover{border-color:var(--primary);color:#fff}

/* ===== 技术伙伴 ===== */
.tech-strip{display:flex;justify-content:center;align-items:center;gap:36px;flex-wrap:wrap;padding:30px 0}
.tech-strip span{
  font-size:16px;font-weight:600;color:var(--txt2);padding:10px 22px;border-radius:30px;
  background:var(--panel);border:1px solid var(--panel-border);transition:.25s;cursor:default;
}
.tech-strip span:hover{color:#fff;border-color:rgba(99,102,241,.5);box-shadow:var(--glow-blue);transform:translateY(-3px)}

/* ===== CTA 条 ===== */
.cta-band{position:relative;color:#fff;padding:80px 0;text-align:center;overflow:hidden;background:radial-gradient(700px 400px at 50% 0%,rgba(99,102,241,.3),transparent 60%)}
.cta-band::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:600px;height:1px;
  background:linear-gradient(90deg,transparent,#8b5cf6,transparent);box-shadow:0 0 30px rgba(139,92,246,.8);
}
.cta-band h2{font-size:36px;margin-bottom:14px;font-weight:800}
.cta-band p{opacity:.85;margin-bottom:30px;color:var(--txt2)}

/* ===== 页脚 ===== */
.footer{background:var(--bg2);color:var(--txt2);padding:60px 0 28px;border-top:1px solid var(--panel-border);position:relative}
.footer::before{content:"";position:absolute;top:-1px;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(99,102,241,.5),transparent)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:36px}
.footer h4{color:#fff;margin-bottom:18px;font-size:16px}
.footer a{display:block;margin-bottom:10px;font-size:13.5px;color:var(--txt2);transition:.2s}
.footer a:hover{color:#fff;transform:translateX(4px)}
.f-logo{color:#fff;font-size:21px;font-weight:800;margin-bottom:16px;display:flex;align-items:center;gap:10px}
.f-about p{font-size:14px;line-height:1.9;margin-bottom:16px}
.f-contact{font-size:14px}
.f-contact p{margin-bottom:8px;display:flex;align-items:center;gap:8px}
.f-links{border-top:1px solid rgba(255,255,255,.06);padding-top:20px;font-size:13px;margin-bottom:20px}
.copyright{border-top:1px solid rgba(255,255,255,.06);padding-top:22px;text-align:center;font-size:13px;color:var(--txt3)}

/* ===== 悬浮 ===== */
.float-bar{position:fixed;right:22px;bottom:22px;z-index:200;display:flex;flex-direction:column;gap:12px}
.float-item{width:52px;height:52px;background:var(--grad);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:22px;box-shadow:var(--glow-blue),0 10px 26px rgba(37,99,235,.45);transition:.2s}
.float-item:hover{transform:scale(1.12)}

/* ===== 滚动进入动画 ===== */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ===== 响应式 ===== */
@media(max-width:960px){
  .hero .container,.contact-grid{grid-template-columns:1fr}
  .feat-grid,.case-grid,.model-grid,.model-grid.three{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr;gap:32px}
  .steps::before{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .feat-grid,.case-grid,.model-grid,.model-grid.three{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .hide-sm{display:none}
  .nav{display:none;position:absolute;top:76px;left:0;right:0;background:rgba(6,10,20,.97);flex-direction:column;padding:18px;border-bottom:1px solid var(--panel-border);gap:4px}
  .nav.open{display:flex}
  .nav-toggle{display:block}
  .hero h1{font-size:34px}
  .hero{padding:80px 0}
  .footer-grid{grid-template-columns:1fr}
  .article{padding:24px}
  .news-item{flex-direction:column;gap:12px}
}

/* ===== 代理+OEM 并排双卡 ===== */
.model-grid.split{grid-template-columns:1fr 1fr;gap:32px}
.model-grid.split .m-card{min-height:420px;justify-content:space-between}
.model-grid.split .m-cat{display:block}
.model-grid.split .m-body ul{flex:1}
.model-grid.split .m-body li{font-size:15px;padding:12px 0}
.model-grid.split .m-head{padding:34px 30px}
.model-grid.split .m-head .price{font-size:34px}
@media(max-width:760px){
  .model-grid.split{grid-template-columns:1fr}
  .model-grid.split .m-card{min-height:auto}
}

/* ===== 下拉框深色修复(解决方案一劳永逸) ===== */
.form select{
  background:#0d1526;               /* 不透明深色底 */
  color:#e6edf7;                    /* 浅色文字 */
  appearance:none;-webkit-appearance:none;-moz-appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394a3b8' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;padding-right:38px;
}
/* 下拉弹出的选项: 深底浅字 */
.form select option{background:#0d1526;color:#e6edf7}
.form select option:hover,.form select option:checked{background:#1e293b;color:#fff}