:root{--brand:#1a4d8f;--brand-dark:#143a6b;--brand-light:#e8f1fb;--accent:#e8743b;--accent-dark:#cf5f29;--bg:#ffffff;--bg-alt:#f5f7fa;--text:#1f2933;--muted:#5b6b7b;--line:#e3e8ef;--radius:10px;--maxw:1120px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.65;font-size:16px}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.3;color:var(--brand-dark);margin:1.2em 0 .6em}
h1{font-size:clamp(1.7rem,4vw,2.4rem)}
h2{font-size:clamp(1.35rem,3vw,1.8rem);border-left:4px solid var(--accent);padding-left:12px}
h3{font-size:1.15rem;color:var(--brand)}
p{margin:.6em 0}
ul,ol{padding-left:1.3em;margin:.6em 0}
li{margin:.3em 0}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 16px}
.site-header{position:sticky;top:0;z-index:50;background:var(--brand-dark);color:#fff;box-shadow:0 2px 8px rgba(0,0,0,.12)}
.nav{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:1.05rem}
.brand:hover{text-decoration:none}
.brand .logo{width:30px;height:30px;background:var(--accent);border-radius:6px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:800;color:#fff}
.nav-links{display:flex;gap:4px;list-style:none;margin:0;padding:0;flex-wrap:wrap}
.nav-links a{color:#dce7f5;padding:8px 10px;border-radius:6px;font-size:.92rem;white-space:nowrap}
.nav-links a:hover{background:rgba(255,255,255,.12);text-decoration:none;color:#fff}
.nav-toggle{display:none;background:none;border:1px solid rgba(255,255,255,.4);color:#fff;border-radius:6px;padding:6px 10px;font-size:1.1rem;cursor:pointer}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:11px 22px;border-radius:8px;font-weight:600;border:none;cursor:pointer;font-size:.98rem}
.btn:hover{background:var(--accent-dark);text-decoration:none;color:#fff}
.btn-secondary{background:#fff;color:var(--brand);border:1px solid var(--brand)}
.btn-secondary:hover{background:var(--brand-light);color:var(--brand-dark)}
.hero{background:linear-gradient(135deg,var(--brand-dark),var(--brand));color:#fff;padding:56px 0}
.hero h1{color:#fff;margin-top:0}
.hero p{font-size:1.08rem;color:#e3edf9;max-width:680px}
.hero .btn{margin-top:14px}
.section{padding:46px 0}
.section.alt{background:var(--bg-alt)}
.breadcrumb{font-size:.85rem;color:var(--muted);padding:12px 0}
.breadcrumb a{color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin-top:18px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;transition:box-shadow .2s,transform .2s}
.card:hover{box-shadow:0 6px 20px rgba(26,77,143,.12);transform:translateY(-2px)}
.card h3{margin-top:0}
.card .ico{width:42px;height:42px;border-radius:10px;background:var(--brand-light);color:var(--brand);display:flex;align-items:center;justify-content:center;font-weight:800;margin-bottom:10px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
table{border-collapse:collapse;width:100%;margin:18px 0;font-size:.95rem;background:#fff}
th,td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
th{background:var(--brand-light);color:var(--brand-dark)}
tr:nth-child(even) td{background:#fafbfd}
.callout{border:1px solid var(--brand-light);background:var(--brand-light);border-radius:var(--radius);padding:18px 20px;margin:18px 0}
.callout.cta{background:linear-gradient(135deg,#fff,#fdf3ec);border-color:#f6d9c6}
.faq-item{border:1px solid var(--line);border-radius:var(--radius);margin:10px 0;overflow:hidden;background:#fff}
.faq-q{width:100%;text-align:left;background:#fff;border:none;padding:16px 18px;font-size:1.02rem;font-weight:600;color:var(--brand-dark);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:10px}
.faq-q .plus{color:var(--accent);font-size:1.3rem;transition:transform .2s}
.faq-q[aria-expanded="true"] .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease}
.faq-a div{padding:0 18px 16px}
.form-row{margin:12px 0}
.form-row label{display:block;font-weight:600;margin-bottom:6px;font-size:.92rem}
.form-row input,.form-row select,.form-row textarea{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:8px;font-size:1rem;font-family:inherit}
.form-row textarea{min-height:110px}
.contact-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:30px}
.info-item{margin:10px 0;padding:12px 0;border-bottom:1px solid var(--line)}
.info-item b{color:var(--brand-dark)}
.site-footer{background:var(--brand-dark);color:#cfe0f3;padding:40px 0 24px;margin-top:40px}
.site-footer a{color:#cfe0f3}
.site-footer h4{color:#fff;margin-top:0}
.footer-cols{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.footer-cols ul{list-style:none;padding:0;margin:0}
.footer-cols li{margin:6px 0}
.copyright{border-top:1px solid rgba(255,255,255,.15);margin-top:24px;padding-top:16px;font-size:.85rem;color:#9db8d8}
.tag{display:inline-block;background:var(--brand-light);color:var(--brand);border-radius:20px;padding:3px 12px;font-size:.82rem;margin:3px 4px 3px 0}
.pill{display:inline-block;background:var(--accent);color:#fff;border-radius:6px;padding:2px 10px;font-size:.8rem;font-weight:600}
.steps{counter-reset:step;list-style:none;padding:0}
.steps li{counter-increment:step;position:relative;padding:14px 14px 14px 56px;border:1px solid var(--line);border-radius:var(--radius);margin:10px 0;background:#fff}
.steps li::before{content:counter(step);position:absolute;left:14px;top:14px;width:30px;height:30px;background:var(--brand);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700}
.skip-link{position:absolute;left:-999px}
.skip-link:focus{left:12px;top:8px;background:#fff;padding:8px 12px;z-index:100;border-radius:6px}
@media(max-width:900px){.grid-2,.grid-3,.contact-grid,.footer-cols{grid-template-columns:1fr}.nav-links{display:none;position:absolute;top:60px;left:0;right:0;background:var(--brand-dark);flex-direction:column;padding:8px 16px}.nav-links.open{display:flex}.nav-links a{padding:12px 8px}.nav-toggle{display:block}}
@media(max-width:560px){.hero{padding:40px 0}h1{font-size:1.6rem}}

/* ===== 手机站增强 ===== */
body{padding-bottom:70px}
.pcards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin-top:18px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:box-shadow .2s,transform .2s}
.pcard:hover{box-shadow:0 6px 20px rgba(26,77,143,.12);transform:translateY(-2px)}
.pcard img{width:100%;aspect-ratio:4/3;object-fit:cover;object-position:center}
.pcard-body{padding:14px 16px 18px}
.pcard-body h3{margin:0 0 6px}
.pcard-body p{font-size:.92rem;color:var(--muted);margin:0 0 10px}
.pcard-body .more{font-weight:600;font-size:.92rem}
.m-actionbar{position:fixed;bottom:0;left:0;right:0;display:flex;gap:10px;padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:#fff;border-top:1px solid var(--line);box-shadow:0 -4px 16px rgba(0,0,0,.08);z-index:90}
.m-actionbar a{flex:1;text-align:center;padding:13px 0;border-radius:10px;font-weight:700;font-size:1rem;display:flex;align-items:center;justify-content:center;gap:8px}
.m-actionbar a:hover{text-decoration:none}
.ab-call{background:var(--accent);color:#fff}
.ab-wx{background:var(--brand);color:#fff}
.ab-call svg,.ab-wx svg{width:18px;height:18px;flex-shrink:0}
.hero-cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
@media(max-width:560px){.pcards{grid-template-columns:1fr}}
.hero-shots{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:22px}
.shot{position:relative;border-radius:10px;overflow:hidden;border:1px solid rgba(255,255,255,.28);display:block}
.shot:hover{text-decoration:none}
.shot img{width:100%;aspect-ratio:4/3;object-fit:cover;object-position:center;display:block}
.shot span{position:absolute;left:0;right:0;bottom:0;background:linear-gradient(transparent,rgba(0,0,0,.75));color:#fff;padding:20px 10px 9px;font-size:.92rem;font-weight:700;text-align:center;letter-spacing:.02em}
@media(max-width:560px){.hero{padding:28px 0}.hero-cta{margin-top:12px}}

/* ===== 需求发送面板 ===== */
.send-panel{border:1px solid #f0d3bf;background:#fffaf6;border-radius:10px;padding:16px;margin-top:14px}
.send-panel textarea{width:100%;min-height:150px;padding:12px;border:1px solid var(--line);border-radius:8px;font-size:.95rem;font-family:inherit;line-height:1.6;background:#fff}
.send-actions{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.send-actions .btn{flex:1;min-width:130px;text-align:center}
.btn-ghost{background:#fff;color:var(--brand);border:1px solid var(--brand)}
.btn-ghost:hover{background:var(--brand-light);color:var(--brand-dark)}
.wx-hint{margin-top:12px;font-size:.95rem;color:var(--text);background:#eef7f0;border:1px solid #cfe7d5;border-radius:8px;padding:10px 12px}
.wx-hint b{color:#1a7a3a;font-size:1.05rem}
.wechat-card{display:flex;gap:14px;align-items:center;border:1px solid var(--line);border-radius:10px;padding:14px;margin:14px 0;background:#fff}
.wechat-card img{width:132px;height:132px;border-radius:8px;border:1px solid var(--line);flex-shrink:0}
.wechat-card .txt{flex:1;font-size:.95rem}
.wechat-card .txt b{display:block;font-size:1.15rem;color:var(--brand-dark);margin-bottom:4px}

.wx-card-home{display:flex;gap:14px;align-items:center;margin-top:16px;padding:14px;border:1px solid #cfe7d5;background:#f2faf4;border-radius:10px}
.wx-card-home img{width:116px;height:116px;border-radius:8px;border:1px solid #d8e8dc;flex-shrink:0;background:#fff}
.wx-card-home .t{font-size:.95rem;color:#2c3e50}
.wx-card-home .t b{display:block;color:#1a7a3a;font-size:1.06rem;margin-bottom:3px}

/* 首屏 4 图网格（2x2） */
.hero-shots-4{grid-template-columns:1fr 1fr;gap:10px;margin-top:18px}
.hero-shots-4 .shot img{aspect-ratio:4/3}
.hero-shots-4 .shot span{font-size:.84rem;padding:16px 8px 7px}
@media(max-width:400px){.hero-shots-4{gap:8px}.hero-shots-4 .shot span{font-size:.78rem}}