/* ============ 蔚诺 Renaud · 简单高级清爽风格 ============ */
:root{
  --blue:#0A1971;
  --blue-2:#0d237f;
  --cyan:#00A1E9;
  --ink:#1f2430;
  --body:#5b6472;
  --muted:#8a93a3;
  --bg:#ffffff;
  --soft:#f7f9fc;
  --line:#e9edf3;
  --radius:12px;
  --maxw:1160px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--body);background:var(--bg);line-height:1.75;font-weight:300;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{color:var(--ink);font-weight:600;line-height:1.35}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:84px 0}
.section--soft{background:var(--soft)}
.section-head{max-width:680px;margin:0 auto 48px}
.section-head .eyebrow{color:var(--cyan);font-weight:600;letter-spacing:.18em;font-size:12px;text-transform:uppercase}
.section-head h2{font-size:30px;margin:10px 0 12px;font-weight:600;letter-spacing:.01em}
.section-head p{color:var(--body);font-size:16px}
.section-head.center{text-align:center}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--blue);color:#fff;padding:13px 30px;border-radius:6px;font-weight:400;font-size:15px;border:none;cursor:pointer;transition:.2s;letter-spacing:.02em}
.btn:hover{background:var(--blue-2)}
.btn.ghost{background:transparent;color:var(--blue);border:1px solid var(--blue)}
.btn.ghost:hover{background:var(--blue);color:#fff}
.btn.light{background:#fff;color:var(--blue)}
.btn.light:hover{background:#eef2fb}

/* ---------- 顶部条 ---------- */
.topbar{background:var(--blue);color:#c3d0f2;font-size:12.5px;font-weight:300}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:36px}
.topbar a{color:#c3d0f2}
.topbar a:hover{color:#fff}

/* ---------- 导航 ---------- */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:80px}
.logo{display:flex;align-items:center}
.logo img{height:34px;width:auto}
.nav-links{display:flex;gap:34px;list-style:none}
.nav-links a{font-weight:400;font-size:15px;color:var(--ink);position:relative;padding:6px 0;letter-spacing:.02em}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1.5px;background:var(--blue);transition:.25s}
.nav-links a:hover{color:var(--blue)}
.nav-links a:hover::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:14px}
.nav-actions .btn{padding:10px 22px;font-size:14px}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.burger span{width:22px;height:1.5px;background:var(--ink);transition:.25s}
.mobile-menu{display:none;background:#fff;border-bottom:1px solid var(--line)}
.mobile-menu a{display:block;padding:14px 24px;border-top:1px solid var(--line);font-weight:400;color:var(--ink)}

/* ---------- Hero 轮播 ---------- */
.hero{position:relative;background:var(--soft)}
.slides{position:relative;height:540px;overflow:hidden}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .9s ease;display:flex;align-items:center}
.slide.active{opacity:1}
.slide img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.slide::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,25,113,.55),rgba(10,25,113,.08) 55%,transparent)}
.slide-caption{position:relative;z-index:2;color:#fff;max-width:600px;padding:0 24px}
.slide-caption .tag{display:inline-block;background:rgba(255,255,255,.16);backdrop-filter:blur(4px);padding:5px 14px;border-radius:999px;font-size:12.5px;font-weight:400;letter-spacing:.08em;margin-bottom:16px}
.slide-caption h1{font-size:44px;font-weight:600;line-height:1.2;margin-bottom:16px;color:#fff;letter-spacing:.01em}
.slide-caption p{font-size:17px;opacity:.9;margin-bottom:28px;font-weight:300}
.dots{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:3;display:flex;gap:9px}
.dots button{width:8px;height:8px;border-radius:50%;border:none;background:rgba(255,255,255,.5);cursor:pointer;transition:.2s}
.dots button.active{background:#fff;width:22px;border-radius:4px}
@media(max-width:768px){.slides{height:400px}.slide-caption h1{font-size:30px}}

/* ---------- 信任条 ---------- */
.trust{border-bottom:1px solid var(--line)}
.trust .container{display:flex;flex-wrap:wrap;justify-content:space-between;gap:24px;padding:30px 24px}
@media(max-width:560px){.trust .container{gap:16px;padding:24px}.trust .item{flex:1 1 40%}}
.trust .item b{font-size:26px;color:var(--blue);display:block;font-weight:600;line-height:1.2}
.trust .item span{font-size:13px;color:var(--muted)}

/* ---------- 特性 ---------- */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:40px}
.feature{text-align:left}
.feature .ic{width:44px;height:44px;border-radius:10px;background:var(--soft);color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:18px;border:1px solid var(--line)}
.feature h3{font-size:17px;color:var(--ink);margin-bottom:8px;font-weight:600}
.feature p{font-size:14px;color:var(--body)}

/* ---------- 月费计划 CTA ---------- */
.plan-cta{background:var(--soft);border:1px solid var(--line);border-radius:16px;overflow:hidden;display:grid;grid-template-columns:1.25fr 1fr;align-items:center}
.plan-cta .left{padding:56px}
.plan-cta .eyebrow{color:var(--cyan);font-weight:600;letter-spacing:.16em;font-size:12px;text-transform:uppercase}
.plan-cta h2{font-size:28px;margin:10px 0 6px}
.plan-cta .price{font-size:44px;font-weight:600;color:var(--blue);margin:8px 0;line-height:1}
.plan-cta .price small{font-size:16px;font-weight:400;color:var(--muted)}
.plan-cta ul{list-style:none;margin:18px 0 26px;display:grid;gap:9px}
.plan-cta li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--body)}
.plan-cta li::before{content:"";flex:none;width:5px;height:5px;border-radius:50%;background:var(--cyan);margin-top:9px}
.plan-cta .right{height:100%;display:flex;align-items:center;justify-content:center;padding:30px;background:#fff}
.plan-cta .right img{max-height:280px;object-fit:contain}
@media(max-width:820px){.plan-cta{grid-template-columns:1fr}.plan-cta .right{display:none}.plan-cta .left{padding:36px}}

/* ---------- 产品网格 ---------- */
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.product-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.product-card:hover{border-color:#d3dbe8;box-shadow:0 8px 24px rgba(10,25,113,.06)}
.product-card .thumb{position:relative;aspect-ratio:1/1;background:var(--soft);overflow:hidden}
.product-card .thumb img{width:100%;height:100%;object-fit:contain;padding:18px;transition:.3s}
.product-card:hover .thumb img{transform:scale(1.04)}
.product-card .badge{position:absolute;top:12px;left:12px;background:var(--blue);color:#fff;font-size:11.5px;font-weight:400;letter-spacing:.05em;padding:3px 11px;border-radius:999px;z-index:2}
.product-card .body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:6px;flex:1}
.product-card .cat{font-size:12px;color:var(--cyan);font-weight:400;letter-spacing:.04em}
.product-card h3{font-size:15px;color:var(--ink);font-weight:600;line-height:1.45;min-height:44px}
.product-card h3 a:hover{color:var(--blue)}
.product-card .desc{font-size:13px;color:var(--muted);flex:1;line-height:1.6}
.product-card .row{margin-top:10px;display:flex;align-items:center;justify-content:space-between}
.product-card .price{color:var(--blue);font-weight:600;font-size:18px}
.product-card .price.inquire{font-size:13px;color:var(--muted);font-weight:400}
.product-card .add{background:transparent;color:var(--blue);border:1px solid var(--blue);border-radius:6px;padding:7px 14px;font-weight:400;cursor:pointer;font-size:13px;transition:.2s}
.product-card .add:hover{background:var(--blue);color:#fff}

/* ---------- 分类 Tabs ---------- */
.tabs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:34px}
.tabs.center{justify-content:center}
.tabs button{border:1px solid var(--line);background:#fff;color:var(--body);padding:9px 22px;border-radius:999px;font-weight:400;cursor:pointer;transition:.2s;font-size:14px}
.tabs button.active{background:var(--blue);color:#fff;border-color:var(--blue)}
.tabs button:hover{border-color:var(--blue);color:var(--blue)}
.tabs button.active:hover{color:#fff}

/* ---------- 滤网技术 ---------- */
.tech-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.tech-item{border-top:2px solid var(--line);padding:20px 4px}
.tech-item .num{font-size:12px;font-weight:600;color:var(--cyan);letter-spacing:.1em}
.tech-item h4{font-size:16px;color:var(--ink);margin:8px 0;font-weight:600}
.tech-item p{font-size:13.5px;color:var(--body)}

/* ---------- 博客 ---------- */
.blog-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.blog-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.25s}
.blog-card:hover{border-color:#d3dbe8;box-shadow:0 8px 24px rgba(10,25,113,.06)}
.blog-card{padding:0;overflow:hidden;display:flex;flex-direction:column}
.blog-card .blog-thumb{display:block;aspect-ratio:16/10;background:var(--soft);overflow:hidden}
.blog-card .blog-thumb img{width:100%;height:100%;object-fit:cover;transition:.3s}
.blog-card:hover .blog-thumb img{transform:scale(1.04)}
.blog-card .body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:8px;flex:1}
.blog-card .date{font-size:12px;color:var(--muted);letter-spacing:.04em}
.blog-card h3{font-size:17px;color:var(--ink);margin:2px 0;font-weight:600;line-height:1.45}
.blog-card h3 a:hover{color:var(--blue)}
.blog-card p{font-size:13.5px;color:var(--body);flex:1}
.blog-card .read-more{font-size:13.5px;color:var(--blue);font-weight:400;margin-top:4px}
.blog-card .read-more:hover{color:var(--cyan)}

/* ---------- 博客详情 ---------- */
.post-wrap{max-width:760px}
.back-link{display:inline-block;color:var(--muted);font-size:14px;margin-bottom:26px}
.back-link:hover{color:var(--blue)}
.post-head .date{font-size:13px;color:var(--muted);letter-spacing:.05em}
.post-head h1{font-size:32px;font-weight:600;margin:10px 0 22px;line-height:1.3}
.post-hero{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);margin-bottom:30px;background:var(--soft)}
.post-hero img{width:100%;max-height:440px;object-fit:cover}
.post-body p{font-size:16px;color:var(--body);line-height:1.9;margin-bottom:18px}
.post-nav{display:flex;justify-content:space-between;gap:16px;border-top:1px solid var(--line);margin-top:36px;padding-top:22px}
.post-nav a{font-size:14.5px;color:var(--blue);max-width:48%}
.post-nav a:hover{color:var(--cyan)}
.post-nav .next{text-align:right;margin-left:auto}

/* ---------- 订阅 ---------- */
.subscribe{background:var(--soft);border:1px solid var(--line);color:var(--ink);text-align:center;border-radius:16px;padding:60px 30px}
.subscribe h2{font-size:28px;margin-bottom:10px}
.subscribe p{color:var(--body);margin-bottom:26px}
.subscribe form{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;max-width:520px;margin:0 auto}
.subscribe input{flex:1;min-width:240px;padding:13px 18px;border:1px solid var(--line);border-radius:6px;font-size:15px;outline:none;font-family:var(--font);font-weight:300}
.subscribe input:focus{border-color:var(--cyan)}
.subscribe .msg{margin-top:14px;font-size:14px;min-height:18px}
.subscribe .msg.ok{color:#1a9e6f}
.subscribe .msg.err{color:#d23b3b}

/* ---------- 页脚 ---------- */
.footer{background:var(--blue);color:#b9c6e8;padding:64px 0 26px;font-weight:300}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:36px}
@media(max-width:960px){.footer-grid{grid-template-columns:1fr 1fr;gap:28px}}
@media(max-width:560px){.footer-grid{grid-template-columns:1fr;gap:26px}}
.footer h4{color:#fff;font-size:14px;margin-bottom:16px;letter-spacing:.08em;font-weight:600}
.footer a{display:block;color:#aebadd;padding:5px 0;font-size:14px;font-weight:300}
.footer a:hover{color:#fff}
.footer .brand img{height:30px;margin-bottom:16px;filter:brightness(0) invert(1)}
.footer .desc{font-size:14px;line-height:1.8;color:#aebadd}
.footer .contact p{font-size:14px;margin:7px 0;color:#aebadd;word-break:break-word}
.footer .contact b{word-break:break-all}
.footer .contact b{color:#fff;font-weight:600}
.footer .contact .btn{margin-top:12px;background:#fff;color:var(--blue)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);margin-top:40px;padding-top:20px;font-size:13px;color:#93a3cf;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.footer-bottom .icp a{color:#93a3cf}
.footer-bottom .icp a:hover{color:#fff}
@media(max-width:560px){.footer-bottom{flex-direction:column;gap:6px}}

/* ---------- 内页头 ---------- */
.page-hero{background:var(--soft);border-bottom:1px solid var(--line);padding:64px 0;text-align:center}
.page-hero h1{font-size:32px;font-weight:600}
.page-hero p{color:var(--body);margin-top:10px;font-size:16px}

/* ---------- 产品页 ---------- */
.shop{display:grid;grid-template-columns:230px 1fr;gap:36px;align-items:start}
.shop-side{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;position:sticky;top:104px}
.shop-side h4{font-size:14px;color:var(--ink);margin-bottom:12px;letter-spacing:.06em;font-weight:600}
.shop-side ul{list-style:none}
.shop-side li{margin:2px 0}
.shop-side button{width:100%;text-align:left;background:none;border:none;padding:9px 12px;border-radius:6px;cursor:pointer;font-size:14px;font-weight:400;color:var(--body);transition:.2s;font-family:var(--font)}
.shop-side button:hover,.shop-side button.active{background:var(--soft);color:var(--blue)}
.shop-side .clear{display:inline-block;margin-top:10px;color:var(--muted);font-size:13px}
.shop-side .clear:hover{color:var(--blue)}
@media(max-width:880px){.shop{grid-template-columns:1fr}.shop-side{position:static}}

/* ---------- 月费计划页 ---------- */
.plan-hero{background:var(--blue);color:#fff;padding:70px 0;text-align:center}
.plan-hero h1{font-size:36px;font-weight:600;color:#fff}
.plan-hero p{opacity:.85;font-weight:300}
.plan-hero .big{font-size:56px;font-weight:600;color:#fff;margin:14px 0;line-height:1}
.plan-hero .big small{font-size:18px;font-weight:300;opacity:.8}
.plan-hero .btn{margin-top:22px;background:#fff;color:var(--blue)}
.svc-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.svc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 16px;text-align:center}
.svc img{width:52px;height:52px;object-fit:contain;margin:0 auto 14px}
.svc h4{font-size:14px;color:var(--ink);font-weight:600;line-height:1.5}
.spec-table{max-width:640px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.spec-table .r{display:flex;border-bottom:1px solid var(--line)}
.spec-table .r:last-child{border-bottom:none}
.spec-table .k{width:180px;background:var(--soft);padding:15px 20px;font-weight:600;color:var(--ink);font-size:14px}
.spec-table .v{padding:15px 20px;flex:1;color:var(--body);font-size:14px}
.tech-2col{display:grid;grid-template-columns:1.1fr 1fr;gap:52px;align-items:center}
.tech-2col img{border-radius:var(--radius);border:1px solid var(--line)}
#plan-filter-desc{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-top:18px}
#plan-filter-desc .fd-title{font-weight:600;color:var(--ink);margin-bottom:8px}
#plan-filter-desc .fd-desc{line-height:1.9;color:var(--body)}
.eyebrow{color:var(--cyan);font-weight:600;letter-spacing:.16em;font-size:12px;text-transform:uppercase}
.svc-note{text-align:center;color:var(--muted);margin-top:20px;font-size:13.5px}
.tech-h2{font-size:28px;color:var(--ink);margin:10px 0 16px}
.tech-p{color:var(--body);margin-bottom:22px}
.tech-img{background:var(--soft)}

/* ---------- 表单 ---------- */
.form-wrap{max-width:640px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:40px}
.form-wrap h2{color:var(--ink);margin-bottom:8px;font-size:24px;font-weight:600}
.form-wrap .sub{color:var(--body);margin-bottom:24px;font-size:14.5px}
.field{margin-bottom:18px}
.field label{display:block;font-weight:400;font-size:14px;margin-bottom:7px;color:var(--ink)}
.field label .req{color:#d23b3b}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:6px;font-size:15px;font-family:var(--font);font-weight:300;outline:none;transition:.2s;background:#fff}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--cyan)}
.field textarea{resize:vertical;min-height:110px}
.form-msg{min-height:20px;margin-top:12px;font-size:14px}
.form-msg.ok{color:#1a9e6f}
.form-msg.err{color:#d23b3b}
.form-note{font-size:13px;color:var(--muted);margin-top:12px}
#prefill{margin-bottom:16px}
.pill{display:inline-block;background:var(--soft);color:var(--blue);border:1px solid var(--line);padding:6px 14px;border-radius:999px;font-size:13px;font-weight:400}

/* ---------- 通用 ---------- */
.text-center{text-align:center}
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.split img{border-radius:var(--radius);border:1px solid var(--line)}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;margin:6px 0}
@media(max-width:960px){.features,.product-grid,.blog-grid,.tech-grid{grid-template-columns:repeat(2,1fr)}.svc-grid{grid-template-columns:repeat(2,1fr)}.tech-2col,.split{grid-template-columns:1fr}}
@media(max-width:600px){.features,.product-grid,.blog-grid,.tech-grid,.svc-grid{grid-template-columns:1fr}.nav-links,.nav-actions .btn{display:none}.burger{display:flex}.mobile-menu.open{display:block}.section{padding:60px 0}.form-wrap{padding:28px}}

/* ============ 管理后台 ============ */
.hidden{display:none !important}
.muted{color:var(--muted);font-size:14px}
.center{text-align:center}
.form-row{margin-bottom:16px}
.form-row label{display:block;font-size:14px;color:var(--ink);margin-bottom:7px;font-weight:400}
.form-control{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:6px;font-size:15px;font-family:var(--font);font-weight:300;outline:none;transition:.2s;background:#fff}
.form-control:focus{border-color:var(--cyan)}
.btn-blue{background:var(--blue);color:#fff}
.btn-blue:hover{background:var(--blue-2)}
.btn-block{width:100%;justify-content:center}
.btn-ghost{background:transparent;color:var(--blue);border:1px solid var(--blue)}
.btn-ghost:hover{background:var(--blue);color:#fff}
.btn-outline{background:#fff;color:var(--blue);border:1px solid var(--line)}
.btn-outline:hover{border-color:var(--blue)}
.form-hint{min-height:20px;margin-top:12px;font-size:14px;color:#d23b3b}

.admin-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:22px}
.admin-bar .form-control{flex:1;min-width:220px}
.admin-bar .btn{white-space:nowrap}

.stat-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:26px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center}
.stat .n{font-size:32px;font-weight:600;color:var(--blue);line-height:1.1}
.stat .l{font-size:13px;color:var(--muted);margin-top:6px}

.table-scroll{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
table.data{width:100%;border-collapse:collapse;font-size:14px;min-width:860px}
table.data th,table.data td{padding:13px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
table.data thead th{background:var(--soft);color:var(--ink);font-weight:600;font-size:13px;white-space:nowrap}
table.data tbody tr:hover{background:var(--soft)}
table.data tbody tr:last-child td{border-bottom:none}

.badge{display:inline-block;padding:3px 11px;border-radius:999px;font-size:12px;font-weight:400;white-space:nowrap}
.badge-new{background:#fff4e0;color:#b07800}
.badge-contacted{background:#e3f0ff;color:#1a5fd0}
.badge-won{background:#dff5ea;color:#1a9e6f}
.badge-lost{background:#f3e5e5;color:#b04a4a}
.badge-spam{background:#eceff3;color:#6b7280}

select.mini{padding:6px 9px;border:1px solid var(--line);border-radius:6px;font-size:13px;font-family:var(--font);background:#fff;outline:none}
select.mini:focus{border-color:var(--cyan)}
.mini-btn{padding:6px 11px;border:1px solid #e5b6b6;background:#fff;color:#b04a4a;border-radius:6px;font-size:13px;cursor:pointer;font-family:var(--font)}
.mini-btn:hover{background:#b04a4a;color:#fff}

@media(max-width:760px){.stat-cards{grid-template-columns:repeat(2,1fr)}}