:root{--primary:#1677ff;--primary-dark:#0b4fd6;--navy:#0a1e3c;--navy2:#0e2a52;--ink:#17233b;--muted:#5b6b82;--bg:#fff;--bg-soft:#f4f7fb;--line:#e3eaf3;--radius:14px}
*{margin:0;padding:0;box-sizing:border-box}html{font-size:16px}body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.75}
img{max-width:100%;height:auto;display:block}a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-dark)}
.container{max-width:1200px;margin:0 auto;padding:0 24px}.container.narrow{max-width:840px}.empty-tip{color:var(--muted);padding:24px 0}
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px}
.brand{display:flex;flex-direction:column;line-height:1.05}.brand-text{font-size:1.75rem;font-weight:800;color:var(--ink);letter-spacing:.04em}.brand-text em{font-style:normal;color:var(--primary)}.brand-text.light{color:#fff}.brand-sub{font-size:.62rem;letter-spacing:.34em;color:var(--muted)}
.main-nav .nav-list{display:flex;gap:26px;list-style:none}.main-nav .nav-list>li{position:relative}.main-nav a{color:var(--ink);font-weight:500;padding:8px 0;display:inline-block;white-space:nowrap}.main-nav a:hover{color:var(--primary)}
.sub-nav{display:none;position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,.08);list-style:none;min-width:160px;padding:8px}.main-nav li:hover .sub-nav{display:block}.sub-nav a{display:block;padding:8px 14px}
.nav-cta{background:var(--primary);color:#fff;font-weight:600;padding:9px 22px;border-radius:999px;white-space:nowrap}.nav-cta:hover{background:var(--primary-dark);color:#fff}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:10px}.nav-toggle span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;border-radius:2px}
.hero{position:relative;color:#fff;overflow:hidden;background:var(--navy)}
.hero-bg{width:100%;height:520px;object-fit:cover}
.hero-content{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center}
.hero-eyebrow{letter-spacing:.28em;font-size:.82rem;color:#8fc3ff;margin-bottom:14px}
.hero h1{font-size:3rem;line-height:1.22;margin-bottom:16px;color:#fff;font-weight:800}
.hero-sub{font-size:1.08rem;color:#d7e5f7;max-width:620px;margin-bottom:28px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 30px;border-radius:999px;font-weight:600;transition:.2s;border:0;cursor:pointer;font-size:1rem}
.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark);color:#fff}
.btn-ghost{border:1px solid rgba(255,255,255,.75);color:#fff}.btn-ghost:hover{border-color:#fff;color:#fff}
.btn-dark{background:var(--navy);color:#fff}.btn-dark:hover{background:var(--navy2);color:#fff}
section h2{font-size:2rem;text-align:center;margin-bottom:10px;font-weight:800}
.section-desc{text-align:center;color:var(--muted);margin-bottom:40px}.section-desc.left{text-align:left}
.products{padding:84px 0}
.product-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.product-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:.25s}
.product-card:hover{box-shadow:0 16px 36px rgba(22,119,255,.13);transform:translateY(-3px)}
.product-card a{color:var(--ink)}.product-card img{width:100%;height:250px;object-fit:cover}
.product-card-body{padding:26px 28px 30px}.product-card-body h3{font-size:1.35rem;margin:8px 0 10px}.product-card-body p{color:var(--muted);font-size:.95rem;margin-bottom:14px}
.tag{display:inline-block;background:#e8f1ff;color:var(--primary-dark);font-size:.75rem;font-weight:600;padding:2px 10px;border-radius:999px}
.more-link{color:var(--primary);font-weight:600;font-size:.92rem}
.why{padding:84px 0;background:var(--bg-soft)}
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:36px}
.feature-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px}
.feature-card h3{font-size:1.12rem;margin-bottom:10px;color:var(--navy)}.feature-card p{color:var(--muted);font-size:.93rem}
.steps-band{padding:84px 0;background:linear-gradient(135deg,var(--navy),var(--navy2));color:#fff}
.steps-band h2{color:#fff}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:36px}
.step{border:1px solid rgba(255,255,255,.22);border-radius:var(--radius);padding:26px 22px}
.step span{font-size:1.6rem;font-weight:800;color:#6db1ff}.step h3{margin:8px 0;color:#fff}.step p{color:#c9daf2;font-size:.92rem}
.home-articles{padding:84px 0 20px}
.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}.section-head h2{margin:0;text-align:left}.more{font-size:.9rem;white-space:nowrap}
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.article-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:.2s}
.article-card:hover{box-shadow:0 10px 28px rgba(22,119,255,.12)}.article-card a{color:var(--ink)}.article-card img{width:100%;height:180px;object-fit:cover}
.article-card-body{padding:18px}.article-card-body h3{font-size:1.03rem;line-height:1.55;margin-bottom:8px}.article-card-body p{font-size:.88rem;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:10px}
.article-date{font-size:.8rem;color:#93a1b5}
.home-faq{padding:44px 0 84px}
.faq-list{list-style:none;max-width:860px;margin:0 auto}.faq-list li{border-bottom:1px solid var(--line)}.faq-list a{display:block;padding:16px 4px;color:var(--ink);font-size:1.03rem}
.faq-list a::before{content:"问";display:inline-block;background:var(--primary);color:#fff;font-size:.75rem;border-radius:4px;padding:1px 7px;margin-right:10px}
.cta-band{background:linear-gradient(135deg,var(--navy),#144a9e);color:#fff;padding:56px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}.cta-inner h2{color:#fff;margin:0 0 8px;text-align:left}.cta-inner p{color:#d7e5f7}.cta-inner img{background:#fff;padding:8px;border-radius:8px}
.page-hero{background:var(--bg-soft);padding:52px 0 36px;border-bottom:1px solid var(--line)}.page-hero h1{font-size:2.1rem;text-align:left}
.crumb{color:var(--muted);font-size:.88rem;margin-top:8px}.crumb a{color:var(--muted)}
.list-wrap{padding:44px 0 70px}.news-list{list-style:none}
.news-item{display:flex;gap:22px;padding:24px 0;border-bottom:1px solid var(--line);color:var(--ink)}.news-item img{width:230px;height:145px;object-fit:cover;border-radius:10px;flex-shrink:0}
.news-item-body h2{font-size:1.22rem;margin-bottom:8px;line-height:1.5;text-align:left}.news-item-body p{color:var(--muted);font-size:.93rem;margin-bottom:8px}
.pagination{display:flex;gap:14px;align-items:center;justify-content:center;padding:34px 0;color:var(--muted)}
.article-detail{padding:52px 0 24px}.article-detail h1{font-size:1.95rem;line-height:1.4;margin:14px 0;text-align:left}
.article-detail .meta{color:var(--muted);font-size:.88rem;margin-bottom:20px;display:flex;gap:16px}
.detail-cover{border-radius:var(--radius);margin:0 auto 30px}
.content{font-size:1.03rem}.content h2{font-size:1.42rem;margin:34px 0 14px;padding-left:12px;border-left:4px solid var(--primary);text-align:left}
.content h3{font-size:1.16rem;margin:24px 0 10px}.content p{margin-bottom:14px}.content ul,.content ol{margin:0 0 16px 22px}.content li{margin-bottom:8px}
.content table{width:100%;border-collapse:collapse;margin:18px 0;font-size:.95rem}.content th,.content td{border:1px solid var(--line);padding:10px 14px;text-align:left}.content th{background:var(--bg-soft)}
.content img{border-radius:10px;margin:16px auto}.content blockquote{border-left:4px solid var(--primary);padding:10px 18px;color:var(--ink);margin:18px 0;background:#eef4ff;border-radius:0 10px 10px 0}
.article-cta{background:var(--bg-soft);border-radius:var(--radius);padding:28px;margin:38px 0;display:flex;align-items:center;justify-content:space-between;gap:20px}.article-cta img{background:#fff;padding:6px;border-radius:8px}.article-cta p{color:var(--muted);font-size:.92rem}
.back-link{margin:24px 0}.related{padding:0 0 60px}.related h2{font-size:1.3rem;margin-bottom:16px;text-align:left}.related ul{list-style:none}.related li{padding:10px 0;border-bottom:1px dashed var(--line)}
.single-page{padding:52px 0 70px}
/* 落地页 */
.lp-hero{background:linear-gradient(135deg,var(--navy),var(--navy2));color:#fff;padding:76px 0 64px}
.lp-hero .container{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.lp-hero h1{font-size:2.55rem;line-height:1.28;margin:12px 0 16px;color:#fff;text-align:left}
.lp-eyebrow{letter-spacing:.24em;font-size:.8rem;color:#8fc3ff}
.lp-sub{color:#d7e5f7;font-size:1.05rem;margin-bottom:26px}
.lp-hero img{border-radius:var(--radius);box-shadow:0 24px 48px rgba(0,0,0,.35);width:100%;height:340px;object-fit:cover}
.lp-def{background:#eef4ff;border:1px solid #cfdefc;border-radius:var(--radius);padding:24px 28px;margin:44px auto 0;font-size:1.05rem}
.lp-def strong{color:var(--primary-dark)}
.lp-section{padding:64px 0}.lp-section.alt{background:var(--bg-soft)}
.lp-section h2{margin-bottom:12px}
.lp-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:32px}
.lp-grid.two{grid-template-columns:1fr 1fr}.lp-grid.four{grid-template-columns:repeat(4,1fr)}
.lp-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px}
.lp-card h3{font-size:1.1rem;margin-bottom:9px;color:var(--navy)}.lp-card p,.lp-card li{color:var(--muted);font-size:.94rem}.lp-card ul{margin-left:18px}
.lp-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:32px;counter-reset:step}
.lp-step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 20px}.lp-step b{display:block;font-size:1.5rem;color:var(--primary);margin-bottom:6px}
.lp-table{width:100%;border-collapse:collapse;margin-top:28px;background:#fff}.lp-table th,.lp-table td{border:1px solid var(--line);padding:12px 16px;text-align:left;font-size:.95rem}.lp-table th{background:var(--navy);color:#fff}
.lp-faq{max-width:860px;margin:28px auto 0}.lp-faq details{border:1px solid var(--line);border-radius:10px;padding:16px 20px;margin-bottom:12px;background:#fff}
.lp-faq summary{font-weight:700;cursor:pointer;color:var(--navy)}.lp-faq p{color:var(--muted);margin-top:10px;font-size:.95rem}
.lp-cta{background:linear-gradient(135deg,var(--navy),#144a9e);border-radius:var(--radius);padding:40px;display:flex;align-items:center;justify-content:space-between;gap:24px;color:#fff;margin:10px 0 64px}
.lp-cta h2{color:#fff;text-align:left;margin:0 0 8px}.lp-cta p{color:#d7e5f7}.lp-cta img{background:#fff;padding:8px;border-radius:8px}
.page-content .lp-section .container,.page-content .lp-hero .container{max-width:1200px}
/* 页脚与表单 */
.site-footer{background:#0a1830;color:#c6d3e3}
.footer-grid{display:grid;grid-template-columns:1.7fr .8fr .8fr 1fr;gap:36px;padding:58px 0 42px}
.footer-grid h3{color:#fff;font-size:1rem;margin-bottom:14px}
.footer-about p{font-size:.9rem;margin-top:14px;color:#9fb0c5}
.footer-links ul{list-style:none}.footer-links li{margin-bottom:9px}.footer-links a{color:#9fb0c5;font-size:.92rem}.footer-links a:hover{color:#fff}
.footer-contact p{font-size:.9rem;color:#9fb0c5;margin-bottom:12px}.footer-contact img{background:#fff;padding:8px;border-radius:8px}
.footer-bottom{border-top:1px solid #1d2f4b;padding:18px 0;font-size:.85rem;color:#8b9cb3;text-align:center}.footer-bottom a{color:#8b9cb3}
.feedback-form{display:flex;flex-direction:column;gap:14px;max-width:560px}
.feedback-form input,.feedback-form textarea{border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-size:1rem;font-family:inherit}
.feedback-form textarea{min-height:120px;resize:vertical}
.feedback-captcha{display:flex;gap:12px;align-items:center}.feedback-captcha img{height:44px;border:1px solid var(--line);border-radius:8px;cursor:pointer}
.form-ok{color:#0a7a42}.form-err{color:#c0392b}
@media(max-width:1000px){.feature-grid,.lp-grid.four{grid-template-columns:1fr 1fr}.lp-grid{grid-template-columns:1fr 1fr}.steps,.lp-steps{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}.hero h1{font-size:2.2rem}.lp-hero .container{grid-template-columns:1fr}.lp-hero img{height:auto}}
@media(max-width:680px){.nav-toggle{display:block}.nav-cta{padding:7px 14px;font-size:.88rem;margin-left:auto;margin-right:4px}
.main-nav{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 12px 24px rgba(0,0,0,.08)}
.main-nav.open{display:block}.main-nav .nav-list{flex-direction:column;gap:0;padding:8px 20px 16px}.main-nav .sub-nav{position:static;box-shadow:none;border:0;padding:0 0 0 16px}
.product-grid,.article-grid,.feature-grid,.lp-grid,.lp-grid.two,.lp-grid.four,.steps,.lp-steps{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}.news-item{flex-direction:column}.news-item img{width:100%;height:auto}
.cta-inner,.article-cta,.lp-cta{flex-direction:column;text-align:center}.lp-cta h2{text-align:center}
.hero-bg{height:440px}.hero h1{font-size:1.85rem}.lp-hero h1{font-size:1.9rem}section h2{font-size:1.6rem}}
.lp-section p{margin-bottom:14px}
.narrow-copy{max-width:860px}
.narrow-copy h2{text-align:left;margin-top:28px}
.lp-hero .container{display:grid}