/* ===== 闪电码官网 设计系统 v2 ===== */
:root{
  --blue:#0595c7; --blue-d:#0479a3; --blue-l:#e6f5fb;
  --navy:#082036; --navy-2:#0d3155; --ink:#1a2433; --muted:#5b6b7f;
  --line:#e6edf3; --bg:#f5f8fb; --card:#ffffff;
  --accent:#ff7a45; --accent-d:#e85f2e;
  --radius:18px; --radius-s:12px;
  --shadow:0 10px 34px rgba(8,32,54,.10);
  --shadow-h:0 18px 48px rgba(8,32,54,.16);
  --maxw:1180px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* 顶部导航 */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--navy)}
.brand .logo{display:inline-flex;align-items:center;justify-content:center;border-radius:9px;background:linear-gradient(135deg,var(--blue),var(--navy));padding:4px 6px}
.brand .logo img{width:auto;height:26px;display:block}
.navlinks{display:flex;gap:26px;font-size:15px;color:var(--muted);font-weight:600}
.navlinks a:hover{color:var(--blue)}
.navlinks a.active{color:var(--blue);font-weight:800;position:relative}
.navlinks a.active::after{content:"";position:absolute;bottom:-4px;left:0;right:0;height:2px;background:var(--blue);border-radius:1px}
.nav .btn{padding:9px 18px;font-size:14px}
@media(max-width:860px){.navlinks{display:none}}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--blue);color:#fff;font-weight:700;padding:13px 26px;border-radius:999px;font-size:15px;transition:.25s;box-shadow:0 8px 20px rgba(5,149,199,.32)}
.btn:hover{background:var(--blue-d);transform:translateY(-2px);box-shadow:0 12px 26px rgba(5,149,199,.42)}
.btn.ghost{background:#fff;color:var(--blue);border:1.5px solid var(--blue)}
.btn.ghost:hover{background:var(--blue-l)}
.btn.dark{background:var(--navy)}
.btn.dark:hover{background:var(--navy-2)}

/* Hero */
.hero{position:relative;overflow:hidden;background:radial-gradient(120% 120% at 80% 0%,#0d3155 0%,#082036 55%,#051426 100%);color:#fff}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;padding:78px 22px 88px}
.hero h1{font-size:clamp(30px,4.6vw,52px);line-height:1.12;font-weight:900;letter-spacing:-.5px}
.hero h1 .hl{color:#5fd0ff}
.hero p.sub{margin:20px 0 30px;font-size:18px;color:#c5d8e8;max-width:30em}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap}
.hero .cta .btn.ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.hero .cta .btn.ghost:hover{background:rgba(255,255,255,.12)}
.hero-art{position:relative;border-radius:24px;overflow:hidden;box-shadow:0 30px 70px rgba(0,0,0,.45);aspect-ratio:4/3}
.hero-art img{width:100%;height:100%;object-fit:cover}
.hero-art::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(5,20,38,.55))}
.trustbar{background:rgba(255,255,255,.06);border-top:1px solid rgba(255,255,255,.12)}
.trustbar .wrap{display:flex;flex-wrap:wrap;gap:14px 38px;padding:18px 22px;justify-content:center;color:#bcd2e4;font-size:14px;font-weight:600}
.trustbar b{color:#fff}
@media(max-width:860px){.hero .wrap{grid-template-columns:1fr;padding:54px 22px 60px}.hero-art{order:-1}}

/* 通用区块 */
section.block{padding:74px 0}
.section-head{text-align:center;max-width:720px;margin:0 auto 46px}
.section-head .kicker{color:var(--blue);font-weight:800;font-size:14px;letter-spacing:2px;text-transform:uppercase}
.section-head .kicker.step{display:inline-block;font-size:20px;letter-spacing:3px;font-weight:900;color:var(--blue);text-transform:none;padding:8px 18px 8px 16px;background:linear-gradient(90deg,rgba(5,149,199,.14),rgba(5,149,199,0));border-left:4px solid var(--blue);border-radius:0 10px 10px 0;margin-bottom:8px}
.section-head .kicker.step b{font-size:26px;font-weight:900;color:var(--navy);letter-spacing:1px;margin-right:6px;font-family:'Segoe UI',system-ui,-apple-system,sans-serif}
.section-head h2{font-size:clamp(25px,3.4vw,38px);margin:12px 0 14px;color:var(--navy);font-weight:900;letter-spacing:-.5px}
.section-head p{color:var(--muted);font-size:17px}
.bg-soft{background:linear-gradient(180deg,#fff,var(--bg))}

/* 卡片网格 */
.grid{display:grid;gap:24px}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c4{grid-template-columns:repeat(4,1fr)}
@media(max-width:980px){.grid.c3,.grid.c4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.grid.c2,.grid.c3,.grid.c4{grid-template-columns:1fr}}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);transition:.28s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-h);border-color:#cfe6f1}
.card .ic{width:56px;height:56px;border-radius:16px;color:#fff;display:flex;align-items:center;justify-content:center;margin-bottom:18px;background:linear-gradient(135deg,var(--blue),var(--blue-d));box-shadow:0 8px 20px rgba(5,149,199,.25);transition:.28s}
.card:hover .ic{transform:translateY(-3px) rotate(-3deg)}
.card .ic.green{background:linear-gradient(135deg,#10b981,#065f46);box-shadow:0 8px 20px rgba(16,185,129,.28)}
.card .ic.orange{background:linear-gradient(135deg,#f59e0b,#c2410c);box-shadow:0 8px 20px rgba(245,158,11,.28)}
.card .ic.red{background:linear-gradient(135deg,#ef4444,#b91c1c);box-shadow:0 8px 20px rgba(239,68,68,.28)}
.card h3{font-size:19px;color:var(--navy);margin-bottom:8px}
.card p{color:var(--muted);font-size:15px}
.card .pic{border-radius:14px;overflow:hidden;margin-bottom:18px;aspect-ratio:16/10}
.card .pic img{width:100%;height:100%;object-fit:cover}
.card .more{margin-top:auto;padding-top:14px;color:var(--blue);font-weight:700;font-size:14px}

/* 特性行（图文交错） */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:center;margin:0 auto 70px;max-width:var(--maxw)}
.feature:nth-child(even) .fmedia{order:2}
.feature .fmedia{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.feature .fmedia img{width:100%;aspect-ratio:4/3;object-fit:cover}
.feature h3{font-size:26px;color:var(--navy);margin-bottom:14px;font-weight:900}
.feature p{color:var(--muted);font-size:16px;margin-bottom:14px}
.feature ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.feature li{display:flex;gap:10px;color:var(--ink);font-size:15px}
.feature li svg{flex:none;margin-top:3px;color:var(--blue)}
.tag{display:inline-block;background:var(--blue-l);color:var(--blue-d);font-size:12.5px;font-weight:700;padding:4px 11px;border-radius:999px;margin:0 6px 6px 0}
@media(max-width:860px){.feature{grid-template-columns:1fr;gap:24px;margin-bottom:48px}.feature:nth-child(even) .fmedia{order:0}}

/* 数据条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:10px}
.stats .s{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-align:center;box-shadow:var(--shadow)}
.stats .s b{display:block;font-size:34px;color:var(--blue);font-weight:900}
.stats .s span{color:var(--muted);font-size:14px}
@media(max-width:720px){.stats{grid-template-columns:repeat(2,1fr)}}

/* 案例卡片 */
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.28s;display:flex;flex-direction:column}
.case:hover{transform:translateY(-5px);box-shadow:var(--shadow-h)}
.case .top{padding:24px 26px;background:linear-gradient(135deg,var(--navy),#0d3155);color:#fff}
.case .top .play{font-size:22px;font-weight:900;line-height:1.25}
.case .top .ind{margin-top:10px;font-size:13px;color:#9fc4dd}
.case .body{padding:22px 26px;flex:1}
.case .body .num{font-size:15px;color:var(--ink);margin-bottom:14px}
.case .body .num b{color:var(--accent);font-size:17px}
.case .foot{padding:14px 26px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}
.case .foot .tags{display:flex;flex-wrap:wrap;gap:6px}
.case .foot .tags span{background:var(--bg);color:var(--muted);font-size:12px;padding:3px 10px;border-radius:999px}
.case .foot a{color:var(--blue);font-weight:700;font-size:13px;white-space:nowrap}

/* 大引述块 */
.quote{background:linear-gradient(135deg,var(--blue),var(--navy));color:#fff;border-radius:var(--radius);padding:46px;text-align:center;box-shadow:var(--shadow)}
.quote p{font-size:clamp(20px,2.6vw,28px);font-weight:800;line-height:1.4;max-width:880px;margin:0 auto}
.quote .by{margin-top:18px;color:#bcd9ec;font-size:15px}

/* 流程步骤 */
.steps{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;counter-reset:s}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius-s);padding:20px 16px;text-align:center;box-shadow:var(--shadow);position:relative}
.step .n{counter-increment:s;width:34px;height:34px;border-radius:50%;background:var(--blue);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;margin:0 auto 12px}
.step .n::before{content:counter(s)}
.step h4{font-size:15px;color:var(--navy);margin-bottom:6px}
.step p{font-size:13px;color:var(--muted)}
@media(max-width:980px){.steps{grid-template-columns:repeat(3,1fr)}}
@media(max-width:560px){.steps{grid-template-columns:repeat(2,1fr)}}

/* 资质/能力 */
.badges{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.badge{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 22px;display:flex;align-items:center;gap:12px;box-shadow:var(--shadow);min-width:200px}
.badge .bi{width:42px;height:42px;border-radius:11px;background:var(--blue-l);color:var(--blue);display:flex;align-items:center;justify-content:center;flex:none}
.badge b{display:block;color:var(--navy);font-size:15px}
.badge span{color:var(--muted);font-size:13px}

/* 页脚 */
.foot{background:var(--navy);color:#aabdd0;padding:56px 0 30px;margin-top:30px}
.foot .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.foot h5{color:#fff;font-size:15px;margin-bottom:16px}
.foot a{display:block;color:#9fb6cb;font-size:14px;padding:5px 0}
.foot a:hover{color:#fff}
.foot .brand{color:#fff;margin-bottom:14px}
.foot .desc{font-size:14px;line-height:1.7;max-width:30em}
.foot .bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:38px;padding-top:20px;font-size:13px;color:#7e95ab;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
@media(max-width:860px){.foot .cols{grid-template-columns:1fr 1fr}.foot .cols .f1{grid-column:1/-1}}

/* 通用工具 */
.center{text-align:center}
.mt-s{margin-top:30px}
.lead{font-size:18px;color:var(--muted);max-width:46em;margin:0 auto}
.split{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
@media(max-width:860px){.split{grid-template-columns:1fr;gap:24px}}

/* 预约演示弹窗 */
.modal{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:22px}
.modal.open{display:flex}
.modal-mask{position:absolute;inset:0;background:rgba(8,32,54,.55);backdrop-filter:saturate(160%) blur(3px)}
.modal-box{position:relative;background:#fff;border-radius:var(--radius);padding:34px 30px 30px;box-shadow:var(--shadow-h);max-width:360px;width:100%;text-align:center;animation:modalIn .28s ease}
@keyframes modalIn{from{opacity:0;transform:translateY(16px) scale(.96)}to{opacity:1;transform:none}}
.modal-close{position:absolute;top:12px;right:14px;width:32px;height:32px;border:none;background:var(--bg);color:var(--muted);border-radius:50%;font-size:20px;line-height:1;cursor:pointer;transition:.2s}
.modal-close:hover{background:var(--line);color:var(--navy)}
.modal-box h3{font-size:20px;color:var(--navy);font-weight:900}
.modal-tip{color:var(--muted);font-size:14px;margin:8px 0 18px}
.modal-qr{width:220px;max-width:100%;margin:0 auto;border-radius:12px;border:1px solid var(--line)}