/* 主题色与基础变量 */
:root{--color-primary:#2563eb;--color-secondary:#10b981;--color-warning:#f59e0b;--color-text:#0f172a;--color-muted:#64748b;--color-bg:#ffffff}
/* 全局重置与基础排版 */
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--color-bg);color:var(--color-text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif}
img{max-width:100%;display:block}
/* 布局容器 */
.container{max-width:1080px;margin:0 auto;padding:0 16px}
/* 头部与导航 */
.header{position:sticky;top:0;background:#fff;border-bottom:1px solid #e5e7eb;z-index:10}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.nav a{color:var(--color-text);text-decoration:none;margin:0 12px}
.nav a:hover{color:var(--color-primary)}
/* 首屏与按钮 */
.hero{padding:64px 0}
.hero h1{font-size:40px;line-height:1.2;margin:0 0 12px;color:var(--color-text)}
.hero p{font-size:18px;color:var(--color-muted);margin:0 0 24px}
.cta{display:inline-block;padding:12px 20px;background:var(--color-primary);color:#fff;text-decoration:none;border-radius:8px}
.cta:hover{background:#1d4ed8}
/* 通用区块与网格 */
.section{padding:40px 0;border-top:1px solid #f1f5f9}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
/* 卡片 */
.card{border:1px solid #e5e7eb;border-radius:12px;padding:16px}
.card h3{margin:0 0 8px;font-size:18px}
/* 页脚 */
.footer{padding:24px 0;border-top:1px solid #e5e7eb;color:var(--color-muted)}
/* 表单与输入控件 */
.form{max-width:640px}
.input{width:100%;padding:12px;border:1px solid #e5e7eb;border-radius:8px;margin:8px 0}
.button{padding:12px 16px;border:0;border-radius:8px;background:var(--color-primary);color:#fff}
.button.secondary{background:var(--color-secondary)}
.notice{padding:12px;border-radius:8px;margin-top:12px}
.notice.success{background:#ecfeff;color:#0e7490}
.notice.error{background:#fef2f2;color:#b91c1c}
/* 响应式断点 */
@media (max-width:768px){
  .grid{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  h1,h2{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .cta-row{flex-direction:column}
  .prices{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .qr-grid{grid-template-columns:1fr}
  .badges{gap:6px}
  .nav{font-size:14px}
  .nav a{margin:0 8px}
}

.badges{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}
.badge{display:inline-block;padding:6px 10px;border-radius:999px;background:#eef2ff;color:#3730a3;font-size:12px}
.list{list-style:none;padding:0;margin:0}
.list li{display:flex;gap:8px;align-items:flex-start;margin:8px 0}
.list .dot{width:8px;height:8px;background:var(--color-secondary);border-radius:50%;margin-top:8px}
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.step{border:1px solid #e5e7eb;border-radius:10px;padding:12px;text-align:center;font-size:14px}
.prices{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.price{border:1px solid #e5e7eb;border-radius:12px;padding:16px}
.price h3{margin:0 0 8px}
.faq{max-width:800px}
.faq-item{border:1px solid #e5e7eb;border-radius:12px;margin:8px 0}
.faq-q{padding:12px;cursor:pointer;font-weight:600}
.faq-a{padding:12px;display:none;color:var(--color-muted)}
.cta-row{display:flex;gap:12px;margin-top:16px}
.qr-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:16px}
.qr{border:1px solid #e5e7eb;border-radius:12px;padding:16px;text-align:center;color:var(--color-muted)}
.card a{color:var(--color-text);text-decoration:none;display:block}
.footer-qr{margin-top:12px}
.footer-qr img{width:120px;height:auto;border:1px solid #e5e7eb;border-radius:8px}
@keyframes spin{to{transform:rotate(360deg)}}
.button.loading{position:relative;pointer-events:none;opacity:.85}
.button.loading::after{content:"";width:16px;height:16px;border:2px solid #fff;border-top-color:transparent;border-radius:50%;position:absolute;right:12px;top:50%;transform:translateY(-50%);animation:spin 1s linear infinite}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.4);display:none;align-items:center;justify-content:center;z-index:100}
.modal.show{display:flex}
.modal-content{background:#fff;border-radius:12px;padding:20px;max-width:420px;width:90%;box-shadow:0 10px 25px rgba(0,0,0,.15)}
.modal-actions{display:flex;justify-content:flex-end;margin-top:12px}