/* 数字百行 · 浅色商务风设计系统 */
:root{
  --blue:#1a56db; --blue-dark:#1447a8; --blue-soft:#eaf1fd;
  --ink:#1f2937; --muted:#6b7280; --line:#e5e7eb;
  --bg:#ffffff; --bg-soft:#f8fafc;
  --radius:10px; --radius-lg:16px;
  --shadow:0 1px 3px rgba(15,23,42,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px}
img,svg{display:block;max-width:100%}
a{color:var(--blue);text-decoration:none}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
h1,h2,h3,h4{line-height:1.3;font-weight:700}
.sec{padding:64px 0}
.sec-soft{background:var(--bg-soft)}
.sec-head{text-align:center;margin-bottom:40px}
.sec-head h2{font-size:clamp(22px,3.2vw,30px)}
.sec-head p{color:var(--muted);margin-top:8px}
.btn{display:inline-block;padding:12px 28px;border-radius:8px;font-size:16px;font-weight:600;
  border:1px solid transparent;cursor:pointer;min-height:44px;line-height:1.4}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-dark)}
.btn-ghost{border-color:var(--blue);color:var(--blue);background:#fff}
.btn-ghost:hover{background:var(--blue-soft)}

/* 顶栏 */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:var(--ink)}
.logo svg{width:32px;height:32px}
.nav{display:flex;align-items:center;gap:28px}
.nav a{color:var(--ink);font-size:15px;font-weight:500;padding:6px 0}
.nav a:hover,.nav a.active{color:var(--blue)}
.nav .btn{padding:9px 20px;min-height:0;font-size:14px}
.nav a.nav-cta{color:#fff}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;padding:10px;cursor:pointer}
.nav-toggle span{width:22px;height:2px;background:var(--ink);transition:.2s}

/* Hero */
.hero{background:linear-gradient(160deg,#f4f8ff 0%,#ffffff 70%);padding:88px 0 72px;text-align:center}
.hero h1{font-size:clamp(28px,5vw,44px);letter-spacing:1px}
.hero h1 em{font-style:normal;color:var(--blue)}
.hero h1 .nw{white-space:nowrap}
.hero .sub{color:var(--muted);font-size:clamp(15px,2vw,18px);margin:18px auto 0;max-width:640px}
.hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin:20px 0 30px;list-style:none}
.hero-tags li{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 14px;
  font-size:13.5px;font-weight:600;color:var(--blue-dark)}
.hero .btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.trust{margin-top:26px;color:#94a3b8;font-size:13px}

/* 卡片 */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px 22px;
  box-shadow:var(--shadow);transition:transform .2s}
.card:hover{transform:translateY(-4px)}
.card .icon{width:48px;height:48px;border-radius:12px;background:var(--blue-soft);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.card .icon svg{width:26px;height:26px}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--muted);font-size:14px;margin-bottom:12px}
.card .from{color:var(--blue-dark);font-weight:700;font-size:15px;margin-bottom:10px}
.card a{font-size:14px;font-weight:600}

/* 流程步骤：首页 4 步与产品页 5 步共用同一套样式（序号圆点 + 连线） */
.steps,.flow{display:grid;gap:22px 26px;margin-bottom:26px;counter-reset:step;list-style:none}
.steps{grid-template-columns:repeat(4,1fr)}
.flow{grid-template-columns:repeat(5,1fr)}
.step,.flow li{position:relative;counter-increment:step;padding-left:46px;background:none;border:0;
  font-size:15px;font-weight:700;color:var(--ink);line-height:1.5;text-align:left}
.step::before,.flow li::before{content:counter(step,decimal-leading-zero);
  position:absolute;left:0;top:0;width:34px;height:34px;border-radius:50%;background:#fff;
  border:1px solid #cfdcf7;color:var(--blue-dark);font-size:12px;font-weight:700;letter-spacing:.3px;
  display:flex;align-items:center;justify-content:center}
.step:not(:last-child)::after,.flow li:not(:last-child)::after{content:"";position:absolute;
  left:40px;right:-16px;top:17px;height:1px;background:var(--line)}
.step h3,.flow li b{display:block;font-size:15px;font-weight:700;color:var(--ink);line-height:1.5}
.step p,.flow li small{display:block;margin-top:4px;font-size:13px;font-weight:400;color:var(--muted);line-height:1.6}

/* 理由/保障 */
.reasons{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.reason{display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.reason .icon{flex:0 0 40px;width:40px;height:40px;border-radius:10px;background:var(--blue-soft);
  display:flex;align-items:center;justify-content:center}
.reason .icon svg{width:22px;height:22px}
.reason h3{font-size:16px;margin-bottom:4px}
.reason p{color:var(--muted);font-size:14px}

/* 产品详情页 */
.pblock{padding:56px 0;border-bottom:1px solid var(--line)}
.pblock:last-of-type{border-bottom:0}
.pblock .tag{display:inline-block;background:var(--blue-soft);color:var(--blue);font-size:13px;
  font-weight:600;border-radius:999px;padding:4px 14px;margin-bottom:12px}
.pblock h2{font-size:clamp(20px,3vw,26px);margin-bottom:10px}
.pblock .lead{color:var(--muted);margin-bottom:24px;max-width:720px}
.cols{display:grid;grid-template-columns:1.2fr .8fr;gap:32px;margin-bottom:24px}
.cols h4{font-size:15px;margin-bottom:10px;color:var(--blue-dark)}
.cols ul{list-style:none}
.cols li{padding:6px 0 6px 22px;position:relative;color:var(--ink);font-size:15px}
.cols li::before{content:"";position:absolute;left:2px;top:14px;width:8px;height:8px;
  border-radius:50%;background:var(--blue)}
.flow li{list-style:none}
.price-box{background:var(--blue-soft);border-radius:var(--radius);padding:16px 20px;
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-bottom:24px}
.price-box .p{font-weight:700;color:var(--blue-dark)}
.price-box .note{color:var(--muted);font-size:13px}
.faq details{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:10px;background:#fff}
.faq summary{padding:14px 18px;font-weight:600;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--blue);font-weight:700}
.faq details[open] summary::after{content:"−"}
.faq .a{padding:0 18px 14px;color:var(--muted);font-size:14.5px}

/* 价格档位卡 */
.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:24px}
.tier{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;
  display:flex;flex-direction:column;transition:border-color .2s,transform .2s}
.tier:hover{border-color:var(--blue);transform:translateY(-2px)}
.tier .tname{font-size:15px;font-weight:700;margin-bottom:6px}
.tier .tprice{color:var(--blue-dark);font-weight:800;font-size:24px;line-height:1.2}
.tier .tprice small{font-size:13px;color:var(--muted);font-weight:500;margin-left:2px}
.tier .tcycle{color:var(--muted);font-size:13px;margin:6px 0 12px}
.tier ul{list-style:none;margin-bottom:18px;flex:1}
.tier li{font-size:13.5px;color:var(--muted);padding:4px 0 4px 18px;position:relative}
.tier li::before{content:"";position:absolute;left:1px;top:12px;width:6px;height:6px;border-radius:50%;background:var(--blue)}
.tier .buy{display:block;text-align:center;background:var(--blue);color:#fff;border-radius:8px;
  padding:10px 0;font-size:14.5px;font-weight:600;min-height:44px;line-height:24px}
.tier .buy:hover{background:var(--blue-dark)}

.price-note{color:var(--muted);font-size:13.5px;margin:-8px 0 24px}

/* 下单 / 收银台 */
.notice{background:#fff7ed;border:1px solid #fed7aa;color:#9a3412;border-radius:var(--radius);
  padding:12px 16px;font-size:14px;margin-bottom:20px}
.notice[hidden]{display:none}
.order-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:32px;align-items:start}
.order-grid[hidden]{display:none}
.order-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;
  box-shadow:var(--shadow)}
.order-card h3{font-size:17px;margin-bottom:16px}
.order-summary{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-bottom:18px}
.order-summary .row{display:flex;justify-content:space-between;gap:16px;padding:12px 16px;
  border-bottom:1px solid var(--line);font-size:14.5px}
.order-summary .row:last-child{border-bottom:0}
.order-summary .k{color:var(--muted);flex:0 0 auto}
.order-summary .v{text-align:right}
.order-summary .total{font-weight:800;color:var(--blue-dark);font-size:19px}
.order-no{font-family:ui-monospace,Consolas,monospace;letter-spacing:.5px;font-weight:700}
.pay-methods{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:16px}
.pay-method{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--line);border-radius:var(--radius);
  padding:14px;cursor:pointer;font-size:14px}
.pay-method.active{border-color:var(--blue);background:var(--blue-soft)}
.pay-methods.static .pay-method{cursor:default}
.pay-method input{margin-top:4px}
.pay-method b{display:block;font-size:15px}
.pay-method span{color:var(--muted);font-size:12.5px}
.pay-panel{margin-top:18px;border:1px dashed var(--blue);background:var(--blue-soft);
  border-radius:var(--radius);padding:18px;font-size:14px}
.pay-panel[hidden]{display:none}
.pay-panel p{margin-bottom:10px}
.status-tag{display:inline-block;background:#fff7ed;color:#9a3412;border:1px solid #fed7aa;
  border-radius:999px;padding:2px 12px;font-size:12.5px;font-weight:600}
.order-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.order-actions .btn{flex:0 0 auto}
.btn-line{background:#fff;border:1px solid var(--line);color:var(--ink)}
.btn-line:hover{border-color:var(--blue);color:var(--blue)}

/* 页头（内页通用） */
.page-hero{background:linear-gradient(160deg,#f4f8ff,#fff);padding:56px 0;text-align:center}
.page-hero h1{font-size:clamp(24px,4vw,34px)}
.page-hero p{color:var(--muted);margin-top:10px}

/* 表格 */
.info-table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow)}
.info-table th,.info-table td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line);font-size:15px}
.info-table td{word-break:break-word;overflow-wrap:anywhere}
.info-table th{background:var(--bg-soft);width:180px;color:var(--muted);font-weight:500;white-space:nowrap}
.info-table tr:last-child th,.info-table tr:last-child td{border-bottom:0}
@media (max-width:560px){
  .info-table,.info-table tbody,.info-table tr,.info-table th,.info-table td{display:block;width:auto}
  .info-table th{white-space:normal;border-bottom:0;padding:12px 16px 2px;font-size:13px}
  .info-table td{padding:2px 16px 14px;font-size:14px;line-height:1.65}
  .info-table tr{border-bottom:1px solid var(--line)}
  .info-table tr:last-child{border-bottom:0}
  .info-table tr:last-child td{border-bottom:0}
}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:32px}
.contact-list{list-style:none}
.contact-list li{display:flex;gap:12px;padding:14px 0;border-bottom:1px dashed var(--line);font-size:15px}
.contact-list .k{color:var(--muted);flex:0 0 64px}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow)}
.form label{display:block;font-size:14px;font-weight:600;margin:14px 0 6px}
.form label:first-child{margin-top:0}
.form input,.form textarea,.form select{width:100%;border:1px solid var(--line);border-radius:8px;padding:12px 14px;
  font-size:15px;font-family:inherit;min-height:44px;background:#fff;color:var(--ink)}
.form textarea{min-height:110px;resize:vertical}
.form input:focus,.form textarea:focus{outline:2px solid var(--blue-soft);border-color:var(--blue)}
.form .err{color:#dc2626;font-size:13px;margin-top:6px;display:none}
.form .err.show{display:block}
.form .tip{color:var(--muted);font-size:13px;margin-top:12px}
.copy-out{margin-top:16px;padding-top:16px;border-top:1px dashed var(--line)}
.copy-out label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.copy-out textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:10px 12px;
  font:inherit;font-size:13.5px;color:var(--ink);background:var(--bg-soft);resize:vertical}
.copy-out .btn{margin-top:10px;width:100%}

/* 页脚 */
.site-footer{background:#0f1c33;color:#cbd5e1;margin-top:80px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;padding:48px 20px 36px}
.foot-logo{color:#fff}
.site-footer .logo svg .mark{fill:#3b82f6}
.site-footer p{font-size:14px;margin-top:12px;color:#94a3b8}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:14px}
.site-footer a{color:#cbd5e1;font-size:14px;display:block;padding:4px 0}
.site-footer a:hover{color:#fff}
.site-footer .ft{font-size:14px}
.foot-bar{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;text-align:center;font-size:13px;color:#94a3b8}
.foot-bar a{display:inline;color:#94a3b8;margin-left:8px}
.foot-bar a:hover{color:#fff}

/* 移动端底部快捷栏 & 回顶 */
.dock{display:none;position:fixed;left:0;right:0;bottom:0;z-index:90;background:#fff;
  border-top:1px solid var(--line);padding:8px 12px calc(8px + env(safe-area-inset-bottom));gap:10px}
.dock a{flex:1;text-align:center;padding:11px 0;border-radius:8px;font-size:15px;font-weight:600;min-height:44px}
.dock .d1{background:var(--blue);color:#fff}
.dock .d2{border:1px solid var(--blue);color:var(--blue)}
.to-top{position:fixed;right:18px;bottom:88px;width:44px;height:44px;border-radius:50%;border:1px solid var(--line);
  background:#fff;color:var(--blue);font-size:20px;cursor:pointer;display:none;z-index:89;box-shadow:var(--shadow)}
.to-top.show{display:block}

/* 动效 */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .5s,transform .5s}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* 响应式 */
@media (max-width:991px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .step::after,.flow li::after{display:none}
  .cols{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .order-grid{grid-template-columns:1fr}
  .tiers{grid-template-columns:1fr}
}
@media (max-width:767px){
  .site-header{backdrop-filter:none;background:#fff}
  .nav{display:none;position:fixed;top:64px;left:0;right:0;height:calc(100vh - 64px);background:#fff;
    flex-direction:column;align-items:flex-start;padding:24px 20px;gap:4px;z-index:99;overflow-y:auto}
  .nav.open{display:flex;animation:navIn .25s ease}
  @keyframes navIn{from{transform:translateX(100%)}to{transform:none}}
  .nav a{font-size:17px;padding:12px 0;width:100%;border-bottom:1px solid var(--line)}
  .nav .nav-cta{margin-top:16px;text-align:center;border-bottom:0;padding:12px 0;font-size:16px}
  .nav-toggle{display:flex}
  .nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle.open span:nth-child(2){opacity:0}
  .nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .hero{padding:60px 0 52px}
  .grid,.reasons{grid-template-columns:1fr}
  .steps,.flow{grid-template-columns:repeat(2,1fr);gap:16px 14px;margin-bottom:22px}
  .step,.flow li{padding-left:38px;font-size:14px}
  .step::before,.flow li::before{width:28px;height:28px;font-size:11px}
  .step h3,.flow li b{font-size:14px}
  .step p,.flow li small{margin-top:2px;font-size:12.5px;line-height:1.55}
  .flow li:last-child:nth-child(odd){grid-column:span 2}
  .contact-grid{grid-template-columns:1fr}
  .order-card{padding:20px}
  .pay-methods{grid-template-columns:1fr}
  .order-actions .btn{width:100%}
  .order-summary .row{flex-direction:column;gap:2px}
  .order-summary .v{text-align:left}
  .foot-grid{grid-template-columns:1fr;gap:24px;padding:36px 20px 28px}
  .dock{display:flex}
  body{padding-bottom:60px}
  .to-top{bottom:74px}
  .sec{padding:44px 0}
}