/* ============================================================
   SENPOP INTERNATIONAL - B2B 英文站框架样式
   设计基调：深蓝+橙色 CTA，B端专业感，沿用独立站首页原型
   ============================================================ */
:root{
  --navy:#0B2A4A;        /* 深蓝主色 */
  --navy-2:#12406E;
  --orange:#F5821F;     /* CTA 橙 */
  --orange-d:#D96A0B;
  --bg:#FFFFFF;
  --bg-gray:#F4F7FA;
  --line:#E3E9EF;
  --text:#1C2B3A;
  --text-gray:#5A6B7B;
  --green:#1FA25A;
  --shadow:0 6px 24px rgba(11,42,74,.08);
  --radius:12px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.65;font-size:16px}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
.topbar{position:sticky;top:0;z-index:99;background:#fff;border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:22px;color:var(--navy)}
.logo .dot{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,var(--navy),var(--navy-2));display:flex;align-items:center;justify-content:center;color:#fff;font-size:17px;font-weight:900}
.logo small{display:block;font-size:10.5px;font-weight:600;color:var(--text-gray);letter-spacing:.4px;line-height:1}
.nav-links{display:flex;align-items:center;gap:6px;list-style:none}
.nav-links a{padding:9px 14px;font-weight:600;font-size:15px;color:var(--text);border-radius:8px;transition:.2s}
.nav-links a:hover{background:#EEF3F8;color:var(--navy)}
.nav-links .cta{background:var(--orange);color:#fff;padding:9px 18px}
.nav-links .cta:hover{background:var(--orange-d)}
.nav-toggle{display:none}
@media(max-width:860px){
  .nav-links{display:none;position:absolute;top:74px;left:0;right:0;background:#fff;flex-direction:column;padding:14px;border-bottom:1px solid var(--line);align-items:flex-start}
  .nav-links.open{display:flex}
  .nav-toggle{display:block;background:none;border:none;font-size:26px;color:var(--navy);cursor:pointer}
}

/* ---------- 通用区块 ---------- */
.section{padding:84px 0}
.section.gray{background:var(--bg-gray)}
.section.blue{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff}
.kicker{color:var(--orange);font-weight:800;font-size:14px;letter-spacing:1.2px;text-transform:uppercase;margin-bottom:10px}
.kicker.light{color:#FFC98A}
h1,h2,h3{line-height:1.25;color:var(--navy)}
.blue h1,.blue h2,.blue h3{color:#fff}
.section h2{font-size:34px;font-weight:800;margin-bottom:10px}
.section .lead{font-size:18px;color:var(--text-gray);max-width:720px}
.blue .lead{color:#C9D8E8}
.center{text-align:center}
.center .lead{margin:0 auto 40px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--orange);color:#fff;font-weight:700;padding:13px 28px;border-radius:8px;font-size:16px;transition:.2s;border:none;cursor:pointer}
.btn:hover{background:var(--orange-d);transform:translateY(-1px)}
.btn.outline{background:transparent;border:2px solid rgba(255,255,255,.7);color:#fff}
.btn.outline:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn.dark{background:var(--navy)}
.btn.dark:hover{background:var(--navy-2)}
.btn.ghost{background:#fff;color:var(--navy);border:1.5px solid var(--line)}
.btn.ghost:hover{border-color:var(--navy)}

/* ---------- HERO ---------- */
.hero{background:linear-gradient(130deg,#0B2A4A 0%,#12395F 55%,#1B4A76 100%);color:#fff;position:relative;overflow:hidden}
.hero:before{content:"";position:absolute;right:-120px;top:-120px;width:460px;height:460px;border-radius:50%;background:rgba(245,130,31,.18)}
.hero:after{content:"";position:absolute;right:60px;bottom:-160px;width:380px;height:380px;border-radius:50%;background:rgba(255,255,255,.05)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;padding:96px 0 110px;position:relative;z-index:2}
.hero h1{font-size:46px;color:#fff;margin:6px 0 18px;font-weight:900}
.hero h1 em{font-style:normal;color:#FFC98A}
.hero .sub{font-size:19px;color:#C9D8E8;margin-bottom:34px;max-width:560px}
.hero .btnrow{display:flex;gap:14px;flex-wrap:wrap}
.hero .trust{display:flex;gap:26px;margin-top:42px;flex-wrap:wrap}
.hero .trust span{font-size:14px;color:#C9D8E8;display:flex;align-items:center;gap:7px}
.hero .trust b{color:#fff}
.hero-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:16px;padding:26px;backdrop-filter:blur(4px)}
.hero-card h3{color:#fff;font-size:18px;margin-bottom:14px}
.hero-card .row{display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px dashed rgba(255,255,255,.14);font-size:14px}
.hero-card .row:last-child{border:none}
.hero-card .row b{color:#FFC98A;font-weight:700}
@media(max-width:860px){.hero-grid{grid-template-columns:1fr;padding:64px 0 70px}.hero h1{font-size:34px}}

/* ---------- 徽标条 ---------- */
.marquee{background:var(--navy);color:#9DB4CC;padding:13px 0;font-size:13.5px;letter-spacing:.6px;text-align:center}
.marquee b{color:#fff}

/* ---------- 产品三线 ---------- */
.lines{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:46px}
.line-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 28px;transition:.25s;display:flex;flex-direction:column}
.line-card:hover{box-shadow:var(--shadow);transform:translateY(-4px);border-color:transparent}
.line-card .ic{width:58px;height:58px;border-radius:13px;display:flex;align-items:center;justify-content:center;font-size:28px;margin-bottom:18px}
.ic1{background:#EAF3FF}.ic2{background:#FFF1E0}.ic3{background:#E7F6ED}
.line-card h3{font-size:20px;margin-bottom:8px}
.line-card p{color:var(--text-gray);font-size:14.5px;flex:1}
.line-card ul{list-style:none;margin:14px 0 18px}
.line-card li{font-size:13.5px;color:var(--text-gray);padding:4px 0 4px 22px;position:relative}
.line-card li:before{content:"✓";position:absolute;left:0;color:var(--orange);font-weight:800}
.line-card .link{font-weight:700;color:var(--navy);font-size:14.5px;display:inline-flex;gap:6px;align-items:center}
@media(max-width:860px){.lines{grid-template-columns:1fr}}

/* ---------- 为什么选我们 ---------- */
.why{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:46px}
.why .item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;text-align:center}
.why .em{font-size:34px;font-weight:900;color:var(--orange);line-height:1}
.why h4{margin:10px 0 6px;color:var(--navy);font-size:16.5px}
.why p{font-size:13.5px;color:var(--text-gray)}
@media(max-width:860px){.why{grid-template-columns:repeat(2,1fr)}}

/* ---------- 应用场景 ---------- */
.apps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:46px}
.app{display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;align-items:flex-start;transition:.2s}
.app:hover{box-shadow:var(--shadow)}
.app .em{font-size:24px;flex-shrink:0}
.app h4{font-size:16px;color:var(--navy);margin-bottom:3px}
.app p{font-size:13.5px;color:var(--text-gray)}
@media(max-width:860px){.apps{grid-template-columns:repeat(2,1fr)}}

/* ---------- CTA ---------- */
.cta-band{background:linear-gradient(120deg,var(--orange),#F5A623);padding:64px 0;text-align:center;color:#fff}
.cta-band h2{color:#fff;font-size:34px}
.cta-band p{color:#FFF4E4;margin:10px auto 28px;max-width:600px}
.cta-band .btn{background:#fff;color:var(--orange-d)}
.cta-band .btn:hover{background:var(--navy);color:#fff}

/* ---------- 页脚 ---------- */
footer{background:#08203A;color:#8FA8BF;padding:60px 0 26px;font-size:14px}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:34px;margin-bottom:36px}
footer h4{color:#fff;font-size:15px;margin-bottom:16px}
footer ul{list-style:none}
footer li{margin-bottom:9px}
footer a:hover{color:#fff}
.fbottom{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:12.5px}
@media(max-width:860px){.fgrid{grid-template-columns:1fr 1fr}}

/* ---------- 页面内页眉 ---------- */
.page-hero{background:linear-gradient(120deg,var(--navy),var(--navy-2));color:#fff;padding:66px 0 58px}
.page-hero h1{color:#fff;font-size:38px}
.page-hero p{color:#C9D8E8;font-size:17px;max-width:720px;margin-top:8px}
.breadcrumb{font-size:13px;color:#9DB4CC;margin-bottom:10px}
.breadcrumb a{color:#9DB4CC}
.breadcrumb a:hover{color:#fff}

/* ---------- 产品筛选/分类 ---------- */
.cat-tabs{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin:34px 0 6px}
.cat-tabs a{border:1.5px solid var(--line);padding:9px 20px;border-radius:999px;font-weight:600;font-size:14px;color:var(--text)}
.cat-tabs a:hover{border-color:var(--navy);color:var(--navy)}
.cat-tabs a.on{background:var(--navy);border-color:var(--navy);color:#fff}

/* 分类区块 */
.cat-block{margin-top:56px}
.cat-head{display:flex;align-items:center;gap:14px;margin-bottom:6px}
.cat-head .num{background:var(--orange);color:#fff;font-size:13px;font-weight:800;border-radius:999px;padding:2px 12px}
.cat-head h2{font-size:26px;margin:0}
.cat-desc{color:var(--text-gray);font-size:14.5px;margin-bottom:24px}

/* 产品网格 */
.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media(max-width:1100px){.pgrid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:760px){.pgrid{grid-template-columns:repeat(2,1fr)}}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.pcard:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.pcard .ph{aspect-ratio:1;background:#F2F5F8;position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center}
.pcard .ph img{width:100%;height:100%;object-fit:contain;padding:6px;transition:.3s}
.pcard:hover .ph img{transform:scale(1.05)}
.pcard .ph .tag{position:absolute;top:10px;left:10px;background:var(--navy);color:#fff;font-size:10.5px;font-weight:700;padding:2px 9px;border-radius:999px;letter-spacing:.4px}
.pcard .bd{padding:15px 16px 18px;display:flex;flex-direction:column;flex:1}
.pcard h3{font-size:15.5px;color:var(--navy)}
.pcard .model{font-size:12px;color:var(--orange);font-weight:700;margin-top:2px}
.pcard .desc{font-size:13px;color:var(--text-gray);margin:9px 0 12px;flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.pcard .specs{list-style:none;margin-bottom:14px;font-size:12px}
.pcard .specs li{display:flex;justify-content:space-between;border-top:1px dashed var(--line);padding:4px 0;color:var(--text-gray)}
.pcard .specs li b{color:var(--text);font-weight:600;text-align:right;margin-left:8px}
.pcard .qa{font-size:13px;font-weight:700;color:var(--navy);display:inline-flex;gap:5px}

/* 详情弹层(details/summary 方案) */
details.spec-detail{margin-top:auto}
details.spec-detail summary{cursor:pointer;list-style:none;font-weight:700;color:var(--navy);font-size:13.5px;display:flex;align-items:center;gap:6px}
details.spec-detail summary::-webkit-details-marker{display:none}
details.spec-detail summary:after{content:"＋";color:var(--orange);font-weight:800;margin-left:auto}
details.spec-detail[open] summary:after{content:"－"}
details.spec-detail table{width:100%;border-collapse:collapse;margin-top:12px;font-size:12px}
details.spec-detail td{border:1px solid var(--line);padding:5px 8px;vertical-align:top}
details.spec-detail td:first-child{background:var(--bg-gray);color:var(--text-gray);white-space:nowrap;font-weight:600;width:44%}

/* ---------- About / Blog / Contact 简单组件 ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.about-grid .tx p{margin-bottom:14px;color:var(--text-gray)}
.stat-row{display:flex;gap:16px;margin-top:26px;flex-wrap:wrap}
.stat{border:1px solid var(--line);border-radius:var(--radius);padding:16px 22px;text-align:center;flex:1;min-width:120px;background:#fff}
.stat b{display:block;font-size:24px;color:var(--orange)}
.stat span{font-size:12.5px;color:var(--text-gray)}
@media(max-width:860px){.about-grid{grid-template-columns:1fr}}

.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px}
@media(max-width:860px){.blog-grid{grid-template-columns:1fr}}
.blog-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:.2s}
.blog-card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.blog-card .thumb{height:170px;display:flex;align-items:center;justify-content:center;font-size:44px}
.blog-card .inner{padding:20px}
.blog-card .date{font-size:12px;color:var(--orange);font-weight:700}
.blog-card h3{font-size:17px;margin:6px 0 8px}
.blog-card p{font-size:13.5px;color:var(--text-gray)}

.dl-card{display:flex;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;margin-bottom:16px}
.dl-card .em{font-size:30px}
.dl-card h3{font-size:17px}
.dl-card p{font-size:13px;color:var(--text-gray);margin-top:2px}
.dl-card .btn{margin-left:auto;padding:10px 20px;font-size:14px;white-space:nowrap}

.form-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:34px;box-shadow:var(--shadow);max-width:640px}
.form-card label{display:block;font-weight:600;font-size:14px;margin:14px 0 5px;color:var(--navy)}
.form-card input,.form-card select,.form-card textarea{width:100%;padding:11px 13px;border:1.5px solid var(--line);border-radius:8px;font-size:15px;font-family:inherit;color:var(--text);background:#fff}
.form-card input:focus,.form-card select:focus,.form-card textarea:focus{outline:none;border-color:var(--navy)}
.form-card textarea{min-height:110px;resize:vertical}
.form-card .btn{margin-top:20px;width:100%;justify-content:center}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
@media(max-width:860px){.contact-grid{grid-template-columns:1fr}}
.cinfo .row2{display:flex;gap:14px;align-items:flex-start;padding:16px 0;border-bottom:1px solid var(--line)}
.cinfo .row2 .em{font-size:22px}
.cinfo b{color:var(--navy)}
.cinfo p{color:var(--text-gray);font-size:14px}

.note{background:#FFF8EC;border:1px solid #F5D9A8;color:#8A5A12;padding:14px 18px;border-radius:10px;font-size:13.5px;margin-top:22px}

/* 返回顶部等小工具 */
.tc{text-align:center}
.mt20{margin-top:20px}.mt40{margin-top:40px}.mb10{margin-bottom:10px}

/* ============================================================
   v2 引流版新增样式：详情页 / 分类FAQ / 应用场景 / 博客文章 / WhatsApp浮动
   ============================================================ */
.btn.ghost,.btn.ghost:hover{background:#fff;color:var(--navy);border:1.5px solid var(--navy)}
.btn.ghost:hover{background:#EEF3F8}

/* WhatsApp 浮动按钮 */
.wa-float{position:fixed;right:22px;bottom:22px;width:58px;height:58px;border-radius:50%;background:#25D366;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 24px rgba(37,211,102,.45);z-index:999;transition:.2s}
.wa-float:hover{transform:scale(1.08)}
.wa-float::after{content:"";position:absolute;top:-3px;right:-3px;width:14px;height:14px;border-radius:50%;background:#FF4B4B;border:2px solid #fff}

/* 产品详情页 */
.pd-grid{display:grid;grid-template-columns:minmax(280px,430px) 1fr;gap:52px;align-items:start}
@media(max-width:860px){.pd-grid{grid-template-columns:1fr;gap:34px}}
.pd-img{background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px;box-shadow:var(--shadow)}
.pd-img img{width:100%;border-radius:8px;background:#fff}
.pd-badges{display:flex;gap:8px;margin-top:18px;flex-wrap:wrap}
.tag2{background:#E7F6ED;color:#137A42;font-weight:700;font-size:12.5px;padding:5px 12px;border-radius:99px}
.pd-feats{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:10px 22px;font-size:15px;color:var(--text)}
.pd-feats li{background:#F4F7FA;border-radius:8px;padding:10px 14px}
@media(max-width:640px){.pd-feats{grid-template-columns:1fr}}
.spec-table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;box-shadow:var(--shadow);font-size:15px}
.spec-table td{padding:13px 20px;border-bottom:1px solid var(--line);vertical-align:top}
.spec-table tr:nth-child(odd) td{background:#F8FAFC}
.spec-table td:first-child{font-weight:700;color:var(--navy);width:220px;background:#EFF4F9}
.rel-row{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:18px}
.rel-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;display:flex;flex-direction:column;gap:6px;transition:.2s}
.rel-card:hover{border-color:var(--orange);transform:translateY(-2px)}
.rel-card img{width:100%;height:120px;object-fit:contain;background:#fff}
.rel-card span{color:var(--orange);font-weight:800;font-size:14px}
.rel-card b{font-size:13.5px;color:var(--navy);line-height:1.35}

/* 分类页 FAQ */
.faq{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px 24px;margin-bottom:14px}
.faq h3{font-size:16.5px;margin-bottom:8px}
.faq p{color:var(--text-gray);font-size:15px}

/* 应用场景页推荐卡 */
.rec-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}
.rec-card{display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;align-items:flex-start;transition:.2s}
.rec-card:hover{border-color:var(--orange);box-shadow:var(--shadow)}
.rec-card .em{font-size:26px}
.rec-card h3{font-size:17px;margin-bottom:4px}
.rec-card h3 a:hover{color:var(--orange)}
.rec-card p{color:var(--text-gray);font-size:14.5px}

/* 博客文章排版 */
.article{max-width:820px}
.article h2{font-size:24px;margin:34px 0 12px}
.article p{color:var(--text);font-size:16.5px;margin-bottom:14px}
.article b{color:var(--navy)}