/* LeadFinder 营销页 共享设计系统 */
:root{
  --blue:#2563eb; --blue-d:#1d4ed8; --blue-l:#dbeafe; --blue-bg:#eff6ff;
  --indigo:#7c3aed; --indigo-d:#6d28d9;
  --ink:#0f172a; --slate:#475569; --muted:#64748b; --dim:#94a3b8;
  --bg:#f8fafc; --bg2:#f1f5f9; --line:#e2e8f0; --line2:#cbd5e1;
  --card:#ffffff; --dark:#0f172a; --dark2:#1e293b; --dark3:#334155;
  --green:#16a34a; --amber:#d97706; --red:#dc2626;
  --shadow:0 1px 2px rgba(15,23,42,.04), 0 12px 32px rgba(15,23,42,.07);
  --shadow-lg:0 10px 40px rgba(15,23,42,.10), 0 2px 10px rgba(15,23,42,.04);
  --ring:0 0 0 3px rgba(37,99,235,.35);
  --radius:16px; --radius-sm:10px; --radius-lg:24px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;background:#0f172a}  /* 兜底色 = footer 主色，极端情况下不至于露出浏览器白底 */
html,body{ min-height:100% }  /* 双保险：让 100vh 经 html 传导，避免 body 孤立 min-height 在某些 flex 布局下被忽略 */
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink); background:var(--bg); line-height:1.6; -webkit-font-smoothing:antialiased;
  min-height:100vh; display:flex; flex-direction:column;  /* 让 footer 在内容不够长时也能贴底 */
}
header{ flex-shrink:0 }  /* sticky header 不要在 flex 列布局中被 shrink，导致下方高度缩水让 footer 不贴底 */
a{text-decoration:none;color:inherit}
a:focus-visible{outline:none;box-shadow:var(--ring);border-radius:4px}
::selection{background:rgba(37,99,235,.16);color:var(--ink)}
img,svg{display:block;max-width:100%}
code{font-family:"SF Mono",Consolas,Monaco,monospace;background:#f1f5f9;padding:2px 6px;border-radius:4px;font-size:.92em;color:#be185d}
pre{background:#0f172a;color:#e2e8f0;padding:18px 22px;border-radius:10px;overflow-x:auto;font-size:13.5px;line-height:1.55}
pre code{background:transparent;padding:0;color:inherit}

/* ===== 容器与按钮 ===== */
.wrap{max-width:1160px;margin:0 auto;padding:0 22px}
.wrap-narrow{max-width:880px;margin:0 auto;padding:0 22px}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:15px;padding:12px 22px;border-radius:10px;cursor:pointer;transition:transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;position:relative;border:1px solid transparent}
.btn:focus-visible{outline:none;box-shadow:var(--ring)}
.btn:active{transform:translateY(0)}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--indigo));color:#fff;box-shadow:0 8px 20px rgba(37,99,235,.35);overflow:hidden}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(37,99,235,.45)}
.btn-primary::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,transparent 30%,rgba(255,255,255,.28) 50%,transparent 70%);transform:translateX(-120%);transition:transform .6s ease;pointer-events:none}
.btn-primary:hover::after{transform:translateX(120%)}
.btn-ghost{background:#fff;color:var(--blue);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--blue);background:#f1f5ff}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#1e293b;transform:translateY(-1px)}
.btn-lg{padding:14px 28px;font-size:16px}

/* ===== 顶部导航 ===== */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:box-shadow .25s ease, background .25s ease, border-color .25s ease}
header.scrolled{box-shadow:0 6px 24px rgba(15,23,42,.07);border-bottom-color:var(--line);background:rgba(255,255,255,.92)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.3px}
.logo .mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--blue),var(--indigo));display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px}
.logo small{font-weight:500;color:var(--muted);font-size:12px;margin-left:2px}
.nav-links{display:flex;gap:26px;font-size:15px;color:var(--slate);font-weight:500}
.nav-links a:hover{color:var(--blue)}
.nav-right{display:flex;align-items:center;gap:12px}
.login-btn{background:var(--blue);color:#fff;padding:9px 20px;border-radius:9px;font-weight:600;font-size:15px;transition:.2s}
.login-btn:hover{background:var(--blue-d);transform:translateY(-1px)}
.menu-toggle{display:none;background:none;border:0;font-size:24px;cursor:pointer;color:var(--ink)}

/* ===== 通用页头 / 面包屑 ===== */
.page-hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#ffffff,#f8fafc);border-bottom:1px solid var(--line);padding:72px 0 56px}
.page-hero .wrap,.page-hero .wrap-narrow{position:relative;z-index:1}
.page-hero::before{content:"";position:absolute;top:-130px;right:-90px;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(124,58,237,.14),transparent 70%);filter:blur(8px);pointer-events:none;z-index:0}
.page-hero::after{content:"";position:absolute;bottom:-150px;left:-70px;width:360px;height:360px;border-radius:50%;background:radial-gradient(circle,rgba(37,99,235,.12),transparent 70%);filter:blur(8px);pointer-events:none;z-index:0}
.page-hero .badge{display:inline-flex;align-items:center;gap:8px;background:var(--blue-bg);color:var(--blue-d);font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;border:1px solid var(--blue-l);margin-bottom:18px}
.page-hero h1{font-size:42px;line-height:1.2;font-weight:800;letter-spacing:-.5px;margin-bottom:14px}
.page-hero h1 .grad{background:linear-gradient(135deg,var(--blue),var(--indigo));-webkit-background-clip:text;background-clip:text;color:transparent}
.page-hero p.lead{font-size:18px;color:var(--slate);max-width:680px}
.page-hero .actions{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:14px}
.breadcrumb a{color:var(--blue)}
.breadcrumb a:hover{text-decoration:underline}

/* ===== Section 通用 ===== */
section{padding:64px 0}
.section-tint{background:linear-gradient(180deg,#f8fafc,#eff6ff)}
.section-white{background:#fff}
.s-title{font-size:13px;font-weight:700;color:var(--blue);letter-spacing:1.5px;text-transform:uppercase;margin-bottom:12px;display:inline-flex;align-items:center;gap:10px}
.s-title::before{content:"";width:26px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--blue),var(--indigo))}
.s-h{font-size:32px;line-height:1.25;font-weight:800;letter-spacing:-.3px;margin-bottom:14px}
.s-sub{font-size:17px;color:var(--slate);max-width:680px;margin-bottom:42px}
.center{text-align:center}
.center .s-sub{margin-left:auto;margin-right:auto}

/* ===== 卡片 ===== */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:transform .25s ease, box-shadow .25s ease, border-color .25s ease;box-shadow:0 1px 2px rgba(15,23,42,.03)}
.card:hover{box-shadow:var(--shadow);transform:translateY(-4px);border-color:var(--blue-l)}
.card .icon{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,#dbeafe,#e9d5ff);color:var(--blue-d);display:flex;align-items:center;justify-content:center;margin-bottom:18px;box-shadow:0 6px 16px rgba(37,99,235,.18)}
.card .icon svg{width:24px;height:24px}
.card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.card p{font-size:14.5px;color:var(--slate);line-height:1.7}
.card ul{list-style:none;margin-top:14px}
.card ul li{font-size:14px;color:var(--slate);padding:5px 0;display:flex;gap:8px;align-items:flex-start}
.card ul li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--blue);margin-top:8px;flex:none}

/* ===== 网格 ===== */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

/* ===== 表格 ===== */
.tbl{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.tbl th,.tbl td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line);font-size:14.5px}
.tbl th{background:#f8fafc;font-weight:700;color:var(--ink);font-size:13px;text-transform:uppercase;letter-spacing:.5px}
.tbl tr:last-child td{border-bottom:0}
.tbl .check{color:var(--green);font-weight:700}
.tbl .dash{color:var(--dim)}

/* ===== 标签 ===== */
.tag{display:inline-flex;align-items:center;font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;background:#f1f5f9;color:var(--slate)}
.tag.green{background:#dcfce7;color:#166534}
.tag.blue{background:#dbeafe;color:#1d4ed8}
.tag.amber{background:#fef3c7;color:#92400e}
.tag.purple{background:#ede9fe;color:#6d28d9}
.tag.red{background:#fee2e2;color:#991b1b}

/* ===== FAQ ===== */
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:12px;margin-bottom:14px;overflow:hidden;transition:.2s}
.faq-item:hover{border-color:var(--blue-l)}
.faq-q{padding:18px 22px;font-weight:600;font-size:16px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq-q::after{content:"+";color:var(--blue);font-size:22px;font-weight:300;transition:.2s;flex:none}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{padding:0 22px;max-height:0;overflow:hidden;transition:max-height .3s,padding .3s;color:var(--slate);font-size:14.5px;line-height:1.7}
.faq-item.open .faq-a{padding:0 22px 20px;max-height:600px}

/* ===== 流程 / 步骤 ===== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;position:relative;overflow:hidden}
.step::before{counter-increment:step;content:"0" counter(step);position:absolute;top:-10px;right:14px;font-size:60px;font-weight:900;color:#e2e8f0;line-height:1}
.step h4{font-size:17px;font-weight:700;margin-bottom:8px;position:relative}
.step p{font-size:14px;color:var(--slate);position:relative;line-height:1.65}

/* ===== 定价卡 ===== */
.price-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.price-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px 22px;position:relative;display:flex;flex-direction:column}
.price-card.featured{border-color:var(--blue);border-width:2px;box-shadow:0 24px 60px rgba(37,99,235,.22);transform:scale(1.04)}
.price-card .badge-tier{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--blue),var(--indigo));color:#fff;font-size:11px;font-weight:700;padding:4px 14px;border-radius:999px;letter-spacing:1px}
.price-card .name{font-size:18px;font-weight:700;margin-bottom:6px}
.price-card .desc{font-size:13px;color:var(--muted);min-height:36px;margin-bottom:18px}
.price-card .num{font-size:38px;font-weight:800;line-height:1;margin-bottom:4px}
.price-card .num small{font-size:15px;font-weight:500;color:var(--muted)}
.price-card .yr{font-size:13px;color:var(--muted);margin-bottom:20px}
.price-card .cta{margin:6px 0 22px}
.price-card ul{list-style:none;flex:1;margin-bottom:18px}
.price-card ul li{font-size:13.5px;padding:6px 0;color:var(--slate);display:flex;gap:8px;align-items:flex-start;line-height:1.55}
.price-card ul li::before{content:"✓";color:var(--green);font-weight:700;flex:none}

/* ===== CTA 块 ===== */
.cta-block{background:linear-gradient(135deg,var(--blue),var(--indigo));border-radius:var(--radius-lg);padding:48px 40px;color:#fff;text-align:center;margin:48px 0;position:relative;overflow:hidden}
.cta-block::before{content:"";position:absolute;width:320px;height:320px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.16),transparent 70%);top:-110px;right:-70px;pointer-events:none}
.cta-block>*{position:relative;z-index:1}
.cta-block h2{font-size:30px;font-weight:800;margin-bottom:12px}
.cta-block p{font-size:16px;opacity:.9;margin-bottom:26px;max-width:580px;margin-left:auto;margin-right:auto}
.cta-block .btn{background:#fff;color:var(--blue)}
.cta-block .btn:hover{background:#f1f5ff;transform:translateY(-2px)}

/* ===== 案例卡 ===== */
.case-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;display:flex;flex-direction:column;gap:14px}
.case-card .logo-row{display:flex;align-items:center;gap:14px}
.case-card .logo-row .av{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,#60a5fa,#a78bfa);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:20px}
.case-card .logo-row h4{font-size:16px;font-weight:700}
.case-card .logo-row .meta{font-size:12px;color:var(--muted)}
.case-card .quote{font-size:14.5px;color:var(--slate);line-height:1.7;font-style:italic;border-left:3px solid var(--blue);padding-left:14px}
.case-card .stats{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:8px}
.case-card .stat{background:var(--bg);padding:10px 12px;border-radius:10px;text-align:center}
.case-card .stat .v{font-size:22px;font-weight:800;color:var(--blue-d)}
.case-card .stat .l{font-size:11px;color:var(--muted);margin-top:2px}

/* ===== 模板卡 ===== */
.tpl-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px;transition:.2s}
.tpl-card:hover{border-color:var(--blue);box-shadow:var(--shadow)}
.tpl-card .head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.tpl-card .head h4{font-size:15px;font-weight:700}
.tpl-card .meta{font-size:12px;color:var(--muted);margin-bottom:10px}
.tpl-card .preview{font-size:13px;color:var(--slate);background:var(--bg);padding:14px;border-radius:8px;border:1px dashed var(--line);max-height:140px;overflow:hidden;position:relative}
.tpl-card .preview::after{content:"";position:absolute;bottom:0;left:0;right:0;height:40px;background:linear-gradient(180deg,transparent,var(--bg))}
.tpl-card .actions{display:flex;gap:8px;margin-top:12px}
.tpl-card .actions a{font-size:13px;color:var(--blue);font-weight:600;padding:5px 12px;border:1px solid var(--line);border-radius:7px}
.tpl-card .actions a:hover{background:var(--blue-bg);border-color:var(--blue)}

/* ===== 页脚 ===== */
footer{background:#0f172a;color:#cbd5e1;padding:40px 0 0;font-size:14px;margin-top:auto;flex-shrink:0}  /* margin-top:auto 让 body flex 列布局把 footer 顶到视口底部；flex-shrink:0 防止 sticky-footer 在多内容场景下被压缩 */
footer .foot-top{padding:54px 0 36px}
footer .foot-cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1fr;gap:36px;margin-bottom:30px}
footer .foot-brand p{font-size:13.5px;color:#94a3b8;line-height:1.7;margin:14px 0 17px}
footer .foot-brand .social{display:flex;gap:10px}
footer .foot-brand .social a{width:34px;height:34px;border-radius:8px;background:#1e293b;color:#94a3b8;display:flex;align-items:center;justify-content:center;transition:.2s}
footer .foot-brand .social a:hover{background:#3b82f6;color:#fff}
footer .foot-col h5{color:#fff;font-size:14px;font-weight:700;margin-bottom:14px;letter-spacing:.3px}
footer .foot-col a{display:block;font-size:13.5px;color:#94a3b8;padding:5px 0;transition:.2s}
footer .foot-col a:hover{color:#fff}
footer .foot-bot{border-top:1px solid #1e293b;padding:20px 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;font-size:13px;color:#94a3b8;background:#0b1220}  /* padding 上下都给 20，避免 footer 贴底时版权行紧贴屏幕边 */
footer .foot-bot a{color:#94a3b8;margin:0 8px}
footer .foot-bot a:hover{color:#fff}

/* ===== 浮动客服 ===== */
.float-chat{position:fixed;right:24px;bottom:24px;width:54px;height:54px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--indigo));color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 30px rgba(37,99,235,.45);cursor:pointer;z-index:80;transition:.2s}
.float-chat:hover{transform:translateY(-3px)}

/* ===== 深色重点卡（白字变体，对比度更友好）=====
   用法：<div class="card card-dark">...</div>
   设计要点：
   1) 渐变用更深的蓝→紫(--blue-d→--indigo-d)，白字对比度天然达标
   2) 白字 100% 不透明（不要 rgba 稀释），列表加粗、加大、行距宽
   3) 右上角 radial 高光让卡片有"漂浮玻璃感"，跟普通 card 区分
*/
.card-dark{
  background:linear-gradient(135deg,var(--blue-d) 0%, var(--indigo-d) 100%);
  color:#fff;
  border:1px solid transparent;
  box-shadow:0 24px 56px -16px rgba(79,70,229,.55), 0 6px 16px rgba(37,99,235,.18);
  position:relative;
  overflow:hidden;
}
.card-dark::after{
  content:"";
  position:absolute; inset:0;
  background:radial-gradient(circle at 100% 0%, rgba(255,255,255,.22), transparent 55%);
  pointer-events:none;
}
.card-dark:hover{
  border-color:transparent;
  box-shadow:0 30px 64px -16px rgba(79,70,229,.65), 0 8px 20px rgba(37,99,235,.22);
}
.card-dark h3{color:#fff; font-size:19px; font-weight:700}
.card-dark h3 .tag{ /* 兼容已有 .tag 样式：反白成半透明白底深字 */ background:rgba(255,255,255,.18); color:#fff; border-color:transparent }
.card-dark p{color:rgba(255,255,255,.95); font-size:15px; line-height:1.75}
.card-dark ul li{
  color:#fff;
  font-size:15.5px;
  font-weight:500;
  padding:8px 0;
}
.card-dark ul li::before{
  background:#fff;
  width:7px; height:7px;
  box-shadow:0 0 0 4px rgba(255,255,255,.18);
  margin-top:9px;
}

/* ===== 进度条 / 评分 ===== */
.score-bar{height:8px;background:#f1f5f9;border-radius:4px;overflow:hidden;margin:8px 0}
.score-bar .fill{height:100%;background:linear-gradient(90deg,var(--green),#22c55e);border-radius:4px}

/* ===== 响应式 ===== */
@media (max-width:960px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr 1fr}
  .price-grid{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  footer .foot-cols{grid-template-columns:1fr 1fr 1fr}
  .page-hero h1{font-size:34px}
  .s-h{font-size:28px}
}
@media (max-width:640px){
  .nav-links{display:none}
  .menu-toggle{display:block}
  .nav-links.open{display:flex;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;gap:0;padding:14px 22px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav-links.open a{padding:10px 0;border-bottom:1px solid var(--line2)}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .price-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  footer .foot-cols{grid-template-columns:1fr 1fr}
  .page-hero h1{font-size:28px}
  .s-h{font-size:24px}
  section{padding:44px 0}
  .cta-block{padding:36px 22px}
  .cta-block h2{font-size:22px}
}