:root{
  --navy:#0F2A4A;
  --navy-2:#12365e;
  --blue:#1E5AA8;
  --blue-2:#2E6FBE;
  --blue-soft:#EAF1FA;
  --bg:#FFFFFF;
  --gray:#F4F6F9;
  --gray-2:#EDF1F6;
  --border:#E2E8F0;
  --text:#16212E;
  --muted:#5A6779;
  --muted-2:#8592A3;
  --ok:#1B8A5A;
  --warn:#B54708;
  --radius:14px;
  --shadow:0 2px 10px rgba(15,42,74,.06);
  --shadow-lg:0 10px 34px rgba(15,42,74,.12);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--text);background:var(--bg);line-height:1.65;font-size:15px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--blue);text-decoration:none}
img{max-width:100%}
.wrap{max-width:1080px;margin:0 auto;padding:0 18px}
.sec{padding:46px 0}
.sec.gray{background:var(--gray)}
.sec-title{font-size:22px;font-weight:700;letter-spacing:.5px;color:var(--navy);margin-bottom:6px}
.sec-sub{color:var(--muted);font-size:13.5px;margin-bottom:24px}
.eyebrow{display:inline-block;font-size:12px;font-weight:700;letter-spacing:1.5px;color:var(--blue);text-transform:uppercase;margin-bottom:10px}
.divider{height:1px;background:var(--border);border:0}

/* ===== Top bar ===== */
.topbar{background:var(--navy);color:#fff}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:52px}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:15px;letter-spacing:.3px}
.brand .mark{width:26px;height:26px;border-radius:7px;background:linear-gradient(135deg,var(--blue-2),#0d243f);display:flex;align-items:center;justify-content:center;font-size:14px}
.brand small{display:block;font-weight:400;font-size:11px;opacity:.72;letter-spacing:.5px}
.topbar .nav{display:none;gap:22px;font-size:13.5px}
.topbar .nav a{color:#cfe0f5;opacity:.9}
.topbar .nav a:hover{color:#fff}

/* ===== Hero ===== */
.hero{background:linear-gradient(160deg,#0F2A4A 0%,#153a63 55%,#1E5AA8 130%);color:#fff;padding:52px 0 46px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-120px;top:-80px;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(46,111,190,.55),transparent 70%)}
.hero .wrap{position:relative;z-index:1}
.hero .badge{display:inline-block;font-size:12.5px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);color:#dbe8fa;padding:5px 13px;border-radius:100px;margin-bottom:16px;letter-spacing:.5px}
.hero h1{font-size:27px;line-height:1.35;font-weight:800;letter-spacing:.3px;margin-bottom:14px}
.hero h1 .accent{color:#8fc0ff}
.hero .lead{font-size:14.5px;color:#d3e0f2;max-width:720px;margin-bottom:16px}
.hero .value{display:inline-flex;align-items:flex-start;gap:8px;background:rgba(255,255,255,.08);border-left:3px solid #8fc0ff;padding:10px 14px;border-radius:8px;font-size:14px;color:#eaf2fd;margin-bottom:22px}
.hero .cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:20px}
.hero-art{position:absolute;right:-40px;top:50%;transform:translateY(-50%);width:600px;max-width:none;height:auto;opacity:.95;pointer-events:none;z-index:0}
@media(max-width:980px){.hero-art{width:480px;right:-170px;top:auto;bottom:-70px;transform:none;opacity:.5}}
@media(max-width:560px){.hero-art{display:none}}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(143,192,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(143,192,255,.06) 1px,transparent 1px);background-size:44px 44px;pointer-events:none;z-index:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;font-size:15px;font-weight:700;padding:13px 24px;border-radius:10px;border:0;cursor:pointer;transition:transform .12s ease,box-shadow .12s ease;letter-spacing:.3px}
.btn:active{transform:translateY(1px)}
.btn-primary{background:#fff;color:var(--navy);box-shadow:0 6px 20px rgba(0,0,0,.18)}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.45)}
.btn-blue{background:var(--blue);color:#fff;box-shadow:0 6px 18px rgba(30,90,168,.28)}
.btn-block{width:100%}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{font-size:12.5px;color:#dbe8fa;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.16);padding:4px 11px;border-radius:100px}
.contact-line{margin-top:18px;font-size:13.5px;color:#cfe0f5;display:flex;flex-wrap:wrap;align-items:center;gap:6px 10px}
.contact-line a{color:#8fc0ff;font-weight:700;letter-spacing:.3px}
.contact-line .sep{opacity:.4}
.form-contact{font-size:13px;color:var(--blue);font-weight:700;margin-top:7px}

/* ===== Cards ===== */
.grid{display:grid;gap:14px}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.card h3{font-size:16.5px;font-weight:700;color:var(--navy);margin-bottom:10px;display:flex;align-items:center;gap:9px}
.card h3 .ico{display:inline-flex;width:28px;height:28px;flex:none;border-radius:9px;background:var(--blue-soft);color:var(--blue);align-items:center;justify-content:center}
.card h3 .ico svg{width:17px;height:17px}
.card h3 .ico.dim{background:#EEF1F5;color:var(--muted)}
.card p{color:var(--muted);font-size:14px}
.card ul{list-style:none;margin-top:10px}
.card ul li{position:relative;padding-left:18px;margin-bottom:7px;font-size:14px;color:var(--muted)}
.card ul li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--blue-2)}
.card .tagline{margin-top:12px;font-size:13px;color:var(--blue);background:var(--blue-soft);padding:8px 12px;border-radius:8px}
.biz-strong{border-left:4px solid var(--blue)}

/* advantages */
.adv{display:grid;gap:14px}
.adv .card{padding:22px}
.adv .num{width:34px;height:34px;border-radius:10px;background:var(--blue-soft);color:var(--blue);font-weight:800;display:flex;align-items:center;justify-content:center;font-size:16px;margin-bottom:12px}
.adv h3{font-size:16px;margin-bottom:8px}
.adv p{font-size:13.8px}

/* tools */
.tools{display:grid;gap:16px}
.tool{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.tool h3{font-size:16px;color:var(--navy);margin-bottom:4px}
.tool .hint{font-size:12.5px;color:var(--muted-2);margin-bottom:14px}
.field{margin-bottom:12px}
.field label{display:block;font-size:13px;font-weight:600;color:#33415c;margin-bottom:6px}
.field label .req{color:#C0392B}
.field .l2{color:var(--muted-2);font-weight:400}
input[type=text],input[type=tel],input[type=email],input[type=number],input[type=date],select,textarea{
  width:100%;font-family:inherit;font-size:14.5px;color:var(--text);background:#fbfcfe;
  border:1px solid var(--border);border-radius:9px;padding:11px 12px;outline:none;transition:border .12s,box-shadow .12s;
  -webkit-appearance:none;appearance:none;
}
select{background-image:url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%235A6779' d='M6 8 0 0h12z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:34px}
input:focus,select:focus,textarea:focus{border-color:var(--blue-2);box-shadow:0 0 0 3px rgba(46,111,190,.12);background:#fff}
textarea{min-height:82px;resize:vertical}
.row{display:grid;gap:12px}
.row.c2{grid-template-columns:1fr 1fr}
.row.c3{grid-template-columns:1fr 1fr 1fr}
.unit{position:relative}
.unit .u{position:absolute;right:12px;top:50%;transform:translateY(-50%);font-size:12.5px;color:var(--muted-2);pointer-events:none}
.calc-result{margin-top:14px;background:var(--gray);border:1px dashed var(--border);border-radius:10px;padding:14px;font-size:14px}
.calc-result .big{font-size:22px;font-weight:800;color:var(--blue)}
.calc-result .li{display:flex;justify-content:space-between;padding:4px 0;color:var(--muted)}
.calc-result .li b{color:var(--text)}
.checklist label.chk{display:flex;align-items:center;gap:10px;padding:11px 13px;border:1px solid var(--border);border-radius:9px;margin-bottom:9px;font-size:14px;cursor:pointer;background:#fbfcfe}
.checklist label.chk input{width:18px;height:18px;accent-color:var(--blue)}
.dl-grid{display:grid;gap:10px}
.dl{display:flex;align-items:center;gap:12px;padding:13px 15px;border:1px solid var(--border);border-radius:10px;background:#fbfcfe}
.dl .fi{width:36px;height:36px;border-radius:9px;background:var(--blue-soft);color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:800;flex:none}
.dl .dt{flex:1;font-size:13.8px;color:var(--text);font-weight:600}
.dl .dt small{display:block;color:var(--muted-2);font-weight:400;font-size:12px;margin-top:1px}
.dl a.btn-mini{font-size:13px;font-weight:700;color:var(--blue);border:1px solid var(--blue);padding:6px 13px;border-radius:8px;white-space:nowrap}

/* process */
.steps{counter-reset:s;display:grid;gap:12px}
.step{display:flex;gap:14px;background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px 18px;box-shadow:var(--shadow)}
.step .n{flex:none;width:30px;height:30px;border-radius:50%;background:var(--navy);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:14px}
.step .t{font-size:14.6px;color:var(--text)}
.step .t small{display:block;color:var(--muted-2);font-size:12.5px;margin-top:2px}

/* fit */
.fit{display:grid;gap:14px}
.fit .card.yes{border-top:3px solid var(--ok)}
.fit .card.no{border-top:3px solid #C0392B}
.fit h3{font-size:16px}
.fit ul li::before{background:var(--ok)}
.fit .no ul li::before{background:#C0392B}

/* form */
.form-card{background:#fff;border:1px solid var(--border);border-radius:16px;padding:22px;box-shadow:var(--shadow-lg)}
.form-note{font-size:12.5px;color:var(--muted-2);margin-top:12px;line-height:1.6}
.form-card .head{text-align:center;margin-bottom:20px}
.form-card .head h3{font-size:20px;color:var(--navy);font-weight:800}
.form-card .head p{font-size:13px;color:var(--muted);margin-top:5px}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* footer */
footer{background:var(--navy);color:#b9c9dd;padding:34px 0 40px;font-size:13px}
footer .disc{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:18px 20px;line-height:1.75;color:#c4d3e6}
footer .disc b{color:#fff}
footer .disc-h{font-size:16px;font-weight:800;color:#fff;margin-bottom:13px;display:flex;align-items:center;gap:8px;letter-spacing:.3px}
footer .disc-list{list-style:none;margin:0}
footer .disc-list li{position:relative;padding-left:17px;margin-bottom:10px;line-height:1.75;color:#c4d3e6}
footer .disc-list li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:#8fc0ff}
footer .disc-list b{color:#fff;font-weight:700}
footer .disc-note{margin-top:13px;padding-top:12px;border-top:1px solid rgba(255,255,255,.12);font-size:12px;color:#93a9c2;line-height:1.7}
footer .cp{margin-top:18px;text-align:center;color:#7d92ab;font-size:12px}

/* ===== Chat widget ===== */
.chat-fab{position:fixed;right:16px;bottom:18px;z-index:60;display:flex;align-items:center;gap:8px;background:var(--blue);color:#fff;border:0;padding:12px 16px;border-radius:100px;font-size:14px;font-weight:700;box-shadow:0 8px 24px rgba(30,90,168,.4);cursor:pointer}
.chat-fab .dot{width:8px;height:8px;border-radius:50%;background:#7CFC9A;box-shadow:0 0 0 3px rgba(124,252,154,.25)}
.chat-panel{position:fixed;right:12px;bottom:12px;z-index:70;width:calc(100vw - 24px);max-width:372px;height:min(78vh,600px);background:#fff;border-radius:16px;box-shadow:0 20px 60px rgba(15,42,74,.3);display:none;flex-direction:column;overflow:hidden;border:1px solid var(--border)}
.chat-panel.open{display:flex}
.chat-head{background:linear-gradient(135deg,var(--navy),#1b4c86);color:#fff;padding:13px 16px;display:flex;align-items:center;gap:10px}
.chat-head .av{width:32px;height:32px;border-radius:9px;background:rgba(255,255,255,.15);display:flex;align-items:center;justify-content:center;font-size:16px}
.chat-head .tt{flex:1;line-height:1.25}
.chat-head .tt b{font-size:14.5px}
.chat-head .tt small{display:block;font-size:11.5px;opacity:.8}
.chat-head .x{background:transparent;border:0;color:#fff;font-size:22px;line-height:1;cursor:pointer;opacity:.85;padding:0 2px}
.chat-body{flex:1;overflow-y:auto;padding:14px;background:#f6f8fb;-webkit-overflow-scrolling:touch}
.msg{max-width:84%;font-size:14px;line-height:1.6;padding:10px 13px;border-radius:13px;margin-bottom:11px;word-break:break-word}
.msg.bot{background:#fff;color:var(--text);border:1px solid var(--border);border-bottom-left-radius:4px}
.msg.me{background:var(--blue);color:#fff;margin-left:auto;border-bottom-right-radius:4px}
.chat-quick{display:flex;flex-wrap:wrap;gap:7px;padding:11px 13px 0}
.chat-quick button{font-size:12.5px;color:var(--blue);background:var(--blue-soft);border:0;padding:7px 12px;border-radius:100px;cursor:pointer}
.chat-input{display:flex;gap:8px;padding:11px;border-top:1px solid var(--border);background:#fff}
.chat-input input{flex:1;border-radius:100px;padding:10px 15px}
.chat-input button{flex:none;width:44px;border-radius:100px;background:var(--blue);color:#fff;border:0;font-size:15px;cursor:pointer}

/* toast */
.toast{position:fixed;left:50%;top:50%;transform:translate(-50%,-50%) scale(.96);z-index:120;background:#fff;border-radius:16px;box-shadow:0 24px 70px rgba(15,42,74,.35);padding:28px 24px;width:calc(100vw - 48px);max-width:360px;text-align:center;display:none;opacity:0;transition:opacity .18s,transform .18s}
.toast.show{display:block;opacity:1;transform:translate(-50%,-50%) scale(1)}
.toast .ic{width:56px;height:56px;border-radius:50%;background:var(--blue-soft);color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:28px;margin:0 auto 14px}
.toast h4{font-size:18px;color:var(--navy);margin-bottom:8px}
.toast p{font-size:13.5px;color:var(--muted);line-height:1.6}
.toast .btn{margin-top:18px}
.overlay{position:fixed;inset:0;background:rgba(10,22,38,.42);z-index:110;display:none}
.overlay.show{display:block}

@media(min-width:720px){
  body{font-size:15.5px}
  .hero{padding:74px 0 66px}
  .hero h1{font-size:38px}
  .hero .lead{font-size:16px}
  .sec{padding:62px 0}
  .sec-title{font-size:27px}
  .topbar .nav{display:flex}
  .grid.c2{grid-template-columns:1fr 1fr}
  .grid.c3{grid-template-columns:repeat(3,1fr)}
  .adv{grid-template-columns:1fr 1fr}
  .tools{grid-template-columns:1fr 1fr}
  .tools .tool.full{grid-column:1 / -1}
  .fit{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .dl-grid{grid-template-columns:1fr 1fr}
  .form-card{padding:34px}
}
/* ===== v2: 图文并茂 & 高级排版 ===== */
.hero-art{display:none}
.hero{padding:42px 0 48px}
@media(min-width:720px){.hero{padding:74px 0 82px}}
.hero-glow{position:absolute;left:-150px;bottom:-150px;width:440px;height:440px;border-radius:50%;background:radial-gradient(circle,rgba(46,111,190,.42),transparent 70%);pointer-events:none;z-index:0}
.hero-wrap{display:grid;gap:30px;align-items:center}
@media(min-width:980px){.hero-wrap{grid-template-columns:1.02fr .98fr;gap:48px}}
.hero-copy{position:relative;z-index:1}
.hero-media{position:relative;border-radius:18px;overflow:hidden;border:1px solid rgba(255,255,255,.16);box-shadow:0 30px 70px rgba(3,15,30,.5);z-index:1}
.hero-media img{display:block;width:100%;height:100%;object-fit:cover;aspect-ratio:16/11;min-height:210px}
.hero-tag{position:absolute;left:14px;bottom:14px;background:rgba(10,28,50,.66);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.22);border-radius:12px;padding:9px 14px;color:#fff;line-height:1.35}
.hero-tag b{display:block;font-size:14px;letter-spacing:.3px}
.hero-tag span{font-size:11.5px;color:#bcd3ef}

.sec{padding:52px 0}
@media(min-width:720px){.sec{padding:82px 0}}
.sec-title{font-size:25px;letter-spacing:.2px}
@media(min-width:720px){.sec-title{font-size:32px}}
.sec-sub{font-size:14.5px;max-width:660px}
.eyebrow{display:inline-flex;align-items:center;gap:9px}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--blue)}

.stats{background:var(--gray);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.stats-wrap{max-width:1080px;margin:0 auto;padding:24px 18px;display:flex;flex-wrap:wrap;justify-content:center;gap:16px 46px}
.stat{text-align:center;min-width:104px}
.stat b{display:block;font-size:20px;font-weight:800;color:var(--navy);letter-spacing:.4px}
.stat span{font-size:12.5px;color:var(--muted)}

.scope{display:grid;gap:18px}
.scope-feature{display:grid;border:1px solid var(--border);border-radius:18px;overflow:hidden;background:#fff;box-shadow:var(--shadow-lg)}
@media(min-width:820px){.scope-feature{grid-template-columns:.92fr 1.08fr}}
.sf-media{position:relative;min-height:236px;background:#0F2A4A}
.sf-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.ribbon{position:absolute;left:14px;top:14px;background:var(--blue);color:#fff;font-size:12px;font-weight:700;padding:5px 12px;border-radius:100px;letter-spacing:.5px;box-shadow:0 6px 16px rgba(30,90,168,.45)}
.sf-body{padding:24px 26px}
.sf-body h3{font-size:18px}
.sf-body p{font-size:14px;color:var(--muted)}
.scope-grid{display:grid;gap:18px}
@media(min-width:620px){.scope-grid{grid-template-columns:1fr 1fr}}
.scope-card{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:16px;overflow:hidden;background:#fff;box-shadow:var(--shadow);transition:box-shadow .2s ease,transform .2s ease}
.scope-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.sc-media{aspect-ratio:16/9;overflow:hidden;background:#EEF1F5}
.sc-media img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .55s ease}
.scope-card:hover .sc-media img{transform:scale(1.05)}
.sc-body{padding:18px 20px 20px;flex:1}
.sc-body h3{font-size:16px}
.sc-body p{font-size:13.6px;color:var(--muted);margin-top:2px}

.band{padding:8px 0 4px}
.band-wrap{display:grid;gap:14px}
@media(min-width:720px){.band-wrap{grid-template-columns:repeat(3,1fr)}}
.band-item{position:relative;margin:0;border-radius:16px;overflow:hidden;box-shadow:var(--shadow);background:#0F2A4A}
.band-item img{display:block;width:100%;height:100%;aspect-ratio:3/2;object-fit:cover;transition:transform .6s ease}
.band-item:hover img{transform:scale(1.05)}
.band-item figcaption{position:absolute;left:0;right:0;bottom:0;padding:28px 15px 13px;color:#fff;font-size:13.5px;font-weight:600;letter-spacing:.3px;background:linear-gradient(transparent,rgba(6,20,38,.85))}

.faq{display:grid;gap:12px;max-width:860px}
.faq-item{border:1px solid var(--border);border-radius:12px;background:#fff;box-shadow:var(--shadow);overflow:hidden}
.faq-item summary{cursor:pointer;list-style:none;padding:16px 20px;font-size:15px;font-weight:700;color:var(--navy);position:relative;padding-right:48px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:20px;color:var(--blue);font-weight:400}
.faq-item[open] summary::after{content:"–"}
.faq-item p{padding:0 20px 18px;font-size:14px;color:var(--muted);line-height:1.75}