:root{
  --teal:#12c2c2;
  --teal-d:#0aa7a7;
  --coral:#ff5a6e;
  --coral-d:#f43d55;
  --ink:#1f2733;
  --muted:#69707d;
  --bg:#ffffff;
  --bg-alt:#f5f8fa;
  --line:#e8edf1;
  --grad:linear-gradient(135deg,#12c2c2 0%,#22d3c5 45%,#ff5a6e 100%);
  --radius:16px;
  --shadow:0 10px 30px rgba(18,60,80,.10);
  --shadow-sm:0 4px 14px rgba(18,60,80,.08);
  --maxw:1080px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  padding-bottom:72px; /* mobile bar space */
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 18px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  border:none;cursor:pointer;font-weight:700;font-size:15px;
  border-radius:999px;padding:12px 22px;color:#fff;
  transition:transform .15s ease,box-shadow .15s ease,opacity .15s ease;
  font-family:inherit;line-height:1.2;
}
.btn:active{transform:scale(.96)}
.btn-primary{background:var(--grad);box-shadow:0 8px 22px rgba(255,90,110,.32)}
.btn-primary:hover{box-shadow:0 12px 28px rgba(255,90,110,.42)}
.btn-lg{font-size:18px;padding:16px 40px}
.btn-mini{background:var(--teal);padding:8px 16px;font-size:14px}
.btn-ico{font-size:18px}
.pulse{animation:pulse 1.9s infinite}
@keyframes pulse{
  0%{box-shadow:0 8px 22px rgba(255,90,110,.32)}
  50%{box-shadow:0 8px 30px rgba(255,90,110,.55)}
  100%{box-shadow:0 8px 22px rgba(255,90,110,.32)}}

/* ---------- 客服悬浮按钮 (Header) ---------- */
.wx-button-small{
  background:var(--coral);
  color:#fff;
  padding:8px 16px;
  font-size:14px;
  font-weight:700;
  border-radius:999px;
  border:1px solid rgba(255,90,110,0.5);
  display:flex;
  align-items:center;
  gap:6px;
  transition:all .2s ease;
  box-shadow:0 4px 14px rgba(255,90,110,0.25);
}
.wx-button-small:hover{
  transform:translateY(-2px);
  box-shadow:0 6px 18px rgba(255,90,110,0.35);}
.wx-ico{font-size:16px}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.9);backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:58px}
.brand{display:flex;align-items:center;gap:10px}
.brand-logo{border-radius:10px}
.brand-name{font-weight:800;font-size:18px;letter-spacing:.5px}
.header-actions{display:flex;align-items:center;gap:10px}

/* ---------- Hero ---------- */
.hero{
  position:relative;text-align:center;color:#fff;overflow:hidden;
  background:var(--grad);
  padding:54px 0 60px;
}
.hero::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:36px;
  background:var(--bg);border-radius:50% 50% 0 0/100% 100% 0 0;
}
.hero-inner{position:relative;z-index:2}
.hero-logo{
  width:96px;height:96px;margin:0 auto 16px;border-radius:24px;
  background:#fff;padding:8px;box-shadow:0 12px 30px rgba(0,0,0,.18);
}
.hero-title{font-size:30px;font-weight:900;letter-spacing:1px;margin-bottom:8px;text-shadow:0 2px 8px rgba(0,0,0,.12)}
.hero-sub{font-size:15px;opacity:.95;margin-bottom:16px}
.tags{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-bottom:22px}
.tag{background:rgba(255,255,255,.22);border:1px solid rgba(255,255,255,.35);padding:5px 12px;border-radius:999px;font-size:13px}
.hero-note{font-size:13px;opacity:.9;margin-top:12px}

/* ---------- 公告 ---------- */
.notice{background:#fff4f5;color:var(--coral-d);border-bottom:1px solid #ffe0e4}
.notice .container{display:flex;align-items:center;gap:10px;padding-top:12px;padding-bottom:12px;font-size:13.5px}
.notice-dot{width:9px;height:9px;border-radius:50%;background:var(--coral);flex:none;animation:blink 1.4s infinite}
@keyframes blink{50%{opacity:.35}}

/* ---------- Section 通用 ---------- */
.section{padding:46px 0}
.section-alt{background:var(--bg-alt)}
.section-title{font-size:24px;font-weight:800;text-align:center;margin-bottom:8px}
.section-title::after{content:"";display:block;width:46px;height:4px;border-radius:4px;background:var(--grad);margin:12px auto 0}
.section-desc{text-align:center;color:var(--muted);margin-bottom:28px;font-size:14.5px}

/* ---------- 预览 ---------- */
.preview-wrap{display:flex;flex-wrap:wrap;gap:28px;align-items:center;justify-content:center}
.phone-frame{
  flex:none;width:270px;border:9px solid #1f2733;border-radius:34px;
  overflow:hidden;box-shadow:var(--shadow);background:#1f2733;
}
.phone-frame img{border-radius:24px}
.preview-points{list-style:none;max-width:340px}
.preview-points li{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:14px 16px;margin-bottom:12px;box-shadow:var(--shadow-sm);font-size:15px;
}
.preview-points b{color:var(--teal-d)}

/* ---------- 特色 ---------- */
.features{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.feature-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 18px;text-align:center;box-shadow:var(--shadow-sm);
  transition:transform .18s ease,box-shadow .18s ease;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.feature-ico{font-size:34px;margin-bottom:10px}
.feature-card h3{font-size:17px;margin-bottom:6px}
.feature-card p{font-size:13.5px;color:var(--muted)}

/* ---------- 步骤 ---------- */
.steps{list-style:none;max-width:640px;margin:0 auto}
.steps li{display:flex;gap:14px;align-items:flex-start;padding:16px 0;border-bottom:1px dashed var(--line)}
.steps li:last-child{border-bottom:none}
.step-num{
  flex:none;width:36px;height:36px;border-radius:50%;background:var(--grad);
  color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;
}
.steps b{font-size:16px}
.steps p{font-size:14px;color:var(--muted)}
.tip{
  margin-top:22px;background:#fff8e6;border:1px solid #ffe6a8;color:#a8791b;
  padding:14px 16px;border-radius:12px;font-size:14px;text-align:center;
}

/* ---------- 下载 CTA ---------- */
.download-cta{text-align:center;background:var(--bg-alt)}
.download-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;margin-top:32px}
.download-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px;text-align:center;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:16px;
}
.download-ico{font-size:56px;margin-bottom:8px}
.download-card h3{font-size:20px;font-weight:800;margin-bottom:4px}
.download-card p{font-size:14px;color:var(--muted);margin-bottom:8px}
.download-card .btn{width:100%}
.service-row{display:flex;align-items:center;gap:10px;justify-content:center;margin-top:auto;padding-top:16px;border-top:1px dashed var(--line)}
.service-id-label{color:var(--muted);font-size:13px;font-weight:600}
.service-row .service-id{font-size:18px;font-weight:700;letter-spacing:.5px;color:var(--teal-d);margin:0}
.btn-copy-small{background:var(--coral);padding:8px 16px;font-size:13px}
.btn-copy-small:hover{background:var(--coral-d)}

/* ---------- Footer ---------- */
.site-footer{background:#1f2733;color:#c7cfda;text-align:center;padding:30px 0}
.footer-brand{font-weight:800;color:#fff;font-size:16px;margin-bottom:6px}
.footer-text{font-size:13px;max-width:560px;margin:0 auto 10px;opacity:.85}
.footer-copy{font-size:12px;opacity:.6}

/* ---------- 手机端底部栏 ---------- */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:60;
  display:none;align-items:center;justify-content:space-between;
  background:#fff;border-top:1px solid var(--line);
  padding:10px 14px calc(10px + env(safe-area-inset-bottom));
  box-shadow:0 -4px 18px rgba(0,0,0,.08);
}
.btn-wx-mobile{background:var(--coral);flex:none;padding:11px 20px}
.btn-wx-mobile:hover{background:var(--coral-d)}
.mobile-bar-dl{flex:1;margin-left:10px}

/* ---------- Toast ---------- */
.toast{
  position:fixed;left:50%;bottom:100px;transform:translateX(-50%) translateY(20px);
  background:rgba(31,39,51,.94);color:#fff;padding:12px 22px;border-radius:999px;
  font-size:14px;z-index:99;opacity:0;pointer-events:none;transition:.3s;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- 响应式 ---------- */
@media (max-width:600px){
  /* Hero 区域优化 */
  .hero{padding:30px 0 40px}
  .hero-title{font-size:28px}
  .hero-sub{font-size:14px}
  
  /* Section 通用 */
  .section{padding:32px 0}
  .section-title{font-size:20px}
  
  /* 特色卡片 */
  .features{gap:10px}
  .feature-card{padding:16px 12px;font-size:13px}
  .feature-ico{font-size:30px}
  .feature-card h3{font-size:15px}
  .feature-card p{font-size:13px}
  
  /* 底部栏 */
  .mobile-bar{display:flex;padding:8px 10px calc(8px + env(safe-area-inset-bottom))}
  .btn-lg{width:100%;max-width:300px}
  body{padding-bottom:70px}
  
  /* 下载卡片 */
  .download-cards{grid-template-columns:1fr;gap:14px}
  .download-card{padding:20px 16px;font-size:14px}
  .download-card h3{font-size:18px}
  .download-card p{font-size:13px}
  .download-ico{font-size:42px}
  
  /* Header 客服按钮优化 */
  .header-actions{gap:6px}
  .wx-button-small{padding:6px 12px;font-size:12px}
}
@media (min-width:601px){
  .btn-mini{display:inline-flex}
}