/* ============ 充小帮官网 · 样式 ============ */
:root{
  --primary:#1a66ff;
  --primary-600:#0d4fd0;
  --ink:#0c1526;
  --ink-2:#3d4b63;
  --muted:#6b7a93;
  --line:#e6ebf5;
  --bg:#ffffff;
  --bg-soft:#f5f8ff;
  --green:#16a34a;
  --radius:14px;
  --shadow:0 10px 30px rgba(20,40,90,.08);
  --maxw:1120px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{max-width:100%}
ul{list-style:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.accent{color:var(--primary)}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:600;padding:12px 24px;border-radius:999px;border:1px solid transparent;transition:.2s;cursor:pointer;line-height:1.2;white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(26,102,255,.25)}
.btn-primary:hover{background:var(--primary-600);transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:#d3ddf2;color:var(--ink)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-white{background:#fff;color:var(--primary)}
.btn-white:hover{transform:translateY(-1px);box-shadow:0 10px 26px rgba(0,0,0,.2)}
.btn-sm{padding:8px 18px;font-size:14px}

/* ===== 顶部导航 ===== */
.site-header{position:fixed;inset:0 0 auto;z-index:50;transition:.25s;background:transparent}
.site-header.scrolled{background:rgba(255,255,255,.92);backdrop-filter:blur(10px);box-shadow:0 1px 0 var(--line)}
.nav-inner{display:flex;align-items:center;height:68px}
.brand{display:inline-flex;align-items:center;gap:9px;font-size:20px;font-weight:800}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,#1a66ff,#6b3dff);color:#fff}
.brand-mark.large{width:52px;height:52px;border-radius:14px}
.nav-links{display:flex;gap:30px;margin-left:44px}
.nav-links a{font-size:15px;color:var(--ink-2);position:relative;padding:6px 0}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--primary);transition:.2s}
.nav-links a:hover{color:var(--primary)}
.nav-links a:hover::after{width:100%}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.nav-toggle{display:none;flex-direction:column;gap:4px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.25s}

/* ===== Hero ===== */
.hero{background:
  radial-gradient(900px 420px at 88% -10%,rgba(107,61,255,.14),transparent 60%),
  radial-gradient(700px 380px at -10% 20%,rgba(26,102,255,.12),transparent 60%),
  linear-gradient(180deg,#f2f6ff, #ffffff 85%);
  padding:150px 0 90px}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);color:var(--primary);font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;margin-bottom:20px;box-shadow:var(--shadow)}
.hero-badge::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--green)}
.hero h1{font-size:48px;line-height:1.25;font-weight:800;letter-spacing:-.5px}
.hero-sub{font-size:17px;color:var(--ink-2);margin:20px 0 28px;max-width:520px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-points{display:flex;gap:22px;margin-top:34px;flex-wrap:wrap}
.hero-points li{display:flex;align-items:center;gap:7px;font-size:14px;color:var(--ink-2)}
.hero-points li::before{content:"";width:16px;height:16px;border-radius:50%;background:rgba(22,163,74,.15);background-image:radial-gradient(circle at center,var(--green) 4px,transparent 4px)}

/* Hero 手机示意图 */
.hero-visual{position:relative;min-height:420px}
.phone-frame{width:240px;background:linear-gradient(160deg,#0d1b3d,#1c2f5e);border-radius:34px;padding:12px;margin:0 auto;box-shadow:0 30px 60px rgba(15,30,70,.28);position:relative;z-index:2}
.phone-top{display:flex;align-items:center;justify-content:space-between;color:#fff;font-size:13px;padding:4px 6px 10px}
.phone-top span{width:36px;height:4px;background:rgba(255,255,255,.25);border-radius:2px}
.phone-top strong{font-size:14px}
.phone-order{background:#fff;border-radius:18px;padding:16px;color:var(--ink)}
.order-tag{display:inline-block;font-size:11px;font-weight:700;color:#fff;background:var(--primary);padding:2px 10px;border-radius:999px;margin-bottom:10px}
.order-title{font-weight:700;font-size:15px}
.order-meta{color:var(--muted);font-size:12px;margin:4px 0 12px}
.order-price small{display:block;color:var(--muted);font-size:11px}
.order-price{font-size:22px;font-weight:800;color:var(--primary)}
.order-btn{background:var(--primary);color:#fff;text-align:center;font-size:13px;font-weight:600;border-radius:10px;padding:9px;margin-top:12px}
.phone-steps{margin-top:14px}
.step-line{display:flex;align-items:center;gap:10px;color:#c7d3ee;font-size:12px;padding:5px 6px}
.step-line i{width:20px;height:20px;border-radius:50%;border:1px solid #4a6db3;background:#24407f;display:inline-flex;align-items:center;justify-content:center;font-style:normal;font-size:11px}
.step-line.done{color:#fff;font-weight:600}
.step-line.done i{background:var(--green);border-color:var(--green)}
.float-card{position:absolute;z-index:3;background:#fff;border-radius:12px;box-shadow:0 14px 34px rgba(20,40,90,.16);font-size:13px;font-weight:600;padding:9px 14px;color:var(--ink)}
.fc-1{top:8%;left:0;animation:float 3.4s ease-in-out infinite}
.fc-1::before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--green);margin-right:6px}
.fc-2{bottom:6%;right:0;animation:float 3.4s ease-in-out 1.1s infinite}
.fc-2::before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--primary);margin-right:6px}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}

/* ===== 通用 section ===== */
.section{padding:88px 0}
.section-alt{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{text-align:center;max-width:640px;margin:0 auto 48px}
.eyebrow{display:inline-block;font-size:12px;font-weight:700;letter-spacing:2px;color:var(--primary);background:rgba(26,102,255,.1);padding:4px 12px;border-radius:999px;margin-bottom:14px}
.eyebrow.light{color:#cfe0ff;background:rgba(255,255,255,.16)}
.section-head h2{font-size:32px;font-weight:800;letter-spacing:-.3px}
.section-head p{color:var(--muted);margin-top:10px}

/* 卡片 */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;transition:.25s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.card-ic{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.card-ic svg{width:24px;height:24px}
.ic-blue{background:rgba(26,102,255,.12);color:var(--primary)}
.ic-green{background:rgba(22,163,74,.12);color:var(--green)}
.ic-orange{background:rgba(245,124,0,.12);color:#e07b00}
.ic-purple{background:rgba(124,58,237,.12);color:#7c3aed}
.card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.card p{font-size:14px;color:var(--ink-2);margin-bottom:14px}
.card-tag{font-size:12px;color:var(--primary);background:rgba(26,102,255,.08);padding:3px 10px;border-radius:999px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:st}
.step{position:relative;background:#fff;border-radius:var(--radius);padding:26px 22px;border:1px solid var(--line)}
.step-num{font-size:36px;font-weight:800;line-height:1;color:transparent;-webkit-text-stroke:1.4px var(--primary);opacity:.8;margin-bottom:14px}
.step h3{font-size:16px;font-weight:700;margin-bottom:6px}
.step p{font-size:13.5px;color:var(--muted)}

/* 优势 */
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;text-align:center;transition:.25s}
.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.feature-ic{width:60px;height:60px;margin:0 auto 16px;border-radius:18px;background:linear-gradient(135deg,#1a66ff,#6b3dff);color:#fff;display:flex;align-items:center;justify-content:center}
.feature-ic svg{width:28px;height:28px}
.feature h3{font-size:17px;margin-bottom:8px}
.feature p{font-size:14px;color:var(--muted)}

/* 骑手横幅 */
.banner{background:linear-gradient(120deg,#0d1b3d 0%,#12307a 55%,#1a66ff 130%);color:#fff;padding:76px 0}
.banner-inner{display:flex;align-items:center;gap:40px;justify-content:space-between}
.banner-copy h2{font-size:30px;font-weight:800;letter-spacing:-.3px;margin-bottom:12px}
.banner-copy p{color:#c9d6f2;max-width:560px}
.banner ul{margin-top:18px;display:grid;gap:8px}
.banner ul li{color:#e3ecff;font-size:14px;display:flex;gap:9px}
.banner ul li::before{content:"✓";color:#58d17f;font-weight:700}

/* 关于 */
.about-inner{max-width:860px}
.about-logo{display:flex;align-items:center;gap:16px;margin-bottom:18px}
.about-logo h2{font-size:26px}
.about-company{color:var(--primary);font-weight:600;font-size:14px}
.about-desc{color:var(--ink-2);margin-bottom:30px}
.about-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.about-grid>div{background:var(--bg-soft);border:1px solid var(--line);border-radius:12px;padding:16px}
.about-grid h4{font-size:13px;color:var(--muted);font-weight:600;margin-bottom:4px}
.about-grid p{font-size:14px;font-weight:600}
.linklike{color:var(--primary)}

/* ===== 底部（备案号置于底部居中） ===== */
.site-footer{background:#0a1326;color:#aab6cf;margin-top:0}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:30px;padding:52px 22px 36px}
.footer-inner .brand{color:#fff;font-size:18px}
.footer-desc{font-size:13px;margin-top:10px;max-width:240px}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:14px}
.footer-col a,.footer-col p{display:block;font-size:13.5px;margin-bottom:9px;color:#aab6cf;transition:.2s}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:18px 0}
.footer-bottom-inner{display:flex;justify-content:center;align-items:center;flex-direction:column;gap:4px;text-align:center}
.footer-bottom p{font-size:13px;color:#8d99b5}
.beian a{color:#8d99b5;transition:.2s}
.beian a:hover{color:#fff}

/* ===== 响应式 ===== */
@media (max-width:960px){
  .hero-inner{grid-template-columns:1fr}
  .hero{padding-top:120px}
  .hero-visual{order:-1;min-height:auto;margin-bottom:10px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:repeat(2,1fr)}
  .nav-links{position:fixed;top:68px;left:0;right:0;background:#fff;flex-direction:column;gap:0;margin:0;padding:8px 22px 14px;box-shadow:0 14px 30px rgba(0,0,0,.1);display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 0;border-bottom:1px solid var(--line);font-size:15px}
  .nav-toggle{display:inline-flex}
  .nav-actions .btn-ghost{display:none}
}
@media (max-width:560px){
  .hero h1{font-size:34px}
  .grid-4,.grid-3,.steps{grid-template-columns:1fr}
  .about-grid{grid-template-columns:1fr 1fr}
  .banner-inner{flex-direction:column;align-items:flex-start}
  .section{padding:64px 0}
}