:root{
  /* ===== screenshot-like palette ===== */
  --bg:#f7f8ff;           /* 背景：浅蓝灰 */
  --card:#ffffff;         /* 卡片白 */
  --txt:#111827;          /* 主文字 */
  --muted:#6b7280;        /* 次文字 */
  --line:#e9ecf6;         /* 分割线（偏蓝灰） */

  /* 顶部条/主按钮：珊瑚红 -> 粉 */
  --brandA:#f98c7f;       /* 取自截图顶部渐变左侧 */
  --brandB:#f49f9d;       /* 取自截图顶部渐变右侧 */
  --red:#ff5a66;          /* 主红（按钮/强调） */
  --red2:#e50914;         /* 深红（hover/重点） */

  --shadow: 0 14px 40px rgba(20,25,40,.10);
  --shadow2: 0 10px 24px rgba(20,25,40,.08);
  --r:18px;
  --r2:22px;
  --max:1180px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "DejaVu Sans";
  background:
    radial-gradient(1000px 450px at 18% -8%, rgba(249,140,127,.18), transparent 55%),
    radial-gradient(900px 420px at 88% -10%, rgba(244,159,157,.16), transparent 55%),
    linear-gradient(180deg, var(--bg) 0%, #ffffff 55%, #ffffff 100%);
  color:var(--txt);
}

a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;border-radius:16px}
.l66-container{max-width:var(--max); margin:0 auto; padding:0 16px}

/* ===== Header: 白底 + 顶部渐变细条（很像截图的红粉顶栏感觉） ===== */
.l66-header{
  position:sticky; top:0; z-index:40;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom:1px solid var(--line);
  box-shadow: 0 10px 22px rgba(20,25,40,.08);
}
.l66-header::before{
  content:"";
  position:absolute; left:0; top:0; width:100%; height:10px;
  background: linear-gradient(90deg, var(--brandA) 0%, var(--brandB) 100%);
  pointer-events:none;
}
.l66-header-inner{display:flex; align-items:center; justify-content:space-between; gap:12px; padding:14px 0}

/* Brand */
.l66-brand{display:flex; align-items:center; gap:12px}
.l66-logo{
  width:44px;height:44px;border-radius:16px;
  display:grid;place-items:center;
  background: linear-gradient(135deg, var(--brandA) 0%, var(--red) 45%, var(--brandB) 100%);
  box-shadow: 0 14px 26px rgba(249,140,127,.22);
  font-weight:900;
  letter-spacing:.5px;
  color:#fff;
}
.l66-logo.sm{width:38px;height:38px;border-radius:14px}
.l66-brandtext strong{display:block;font-size:15px;line-height:1.1}
.l66-brandtext em{display:block;font-style:normal;color:var(--muted);font-size:12px;margin-top:2px}

/* Nav */
.l66-nav{display:flex; align-items:center; gap:10px}
.l66-nav a{
  padding:10px 12px;border-radius:14px;
  color:#374151;
  border:1px solid transparent;
  background:transparent;
}
.l66-nav a:hover{
  color:var(--txt);
  border-color:var(--line);
  background: rgba(247,248,255,.85);
}

/* 语言切换：红边红字（类似截图按钮风格） */
.l66-lang{display:flex; align-items:center; gap:8px; margin-left:6px}
.l66-lang a{padding:8px 10px}
.l66-lang .active{
  color:var(--red2);
  background: #ffffff;
  border:1px solid rgba(229,9,20,.25);
}
.l66-lang .sep{color:rgba(17,24,39,.35)}

/* Burger */
.l66-burger{
  display:none;
  width:44px;height:44px;border-radius:16px;
  border:1px solid var(--line);
  background:#fff;
  cursor:pointer;
}
.l66-burger span{display:block;height:2px;background:#111827;margin:7px 10px;border-radius:2px;opacity:.85}

.l66-main{padding:22px 0 44px}

/* Cards / Sections */
.card{
  background: var(--card);
  border:1px solid var(--line);
  border-radius:var(--r2);
  box-shadow: var(--shadow2);
}
.section{margin:18px 0}
.p16{padding:16px}
.p20{padding:20px}
.p24{padding:24px}

.h1{font-size:34px; line-height:1.12; margin:0}
.h2{font-size:20px; margin:0 0 8px}
.lead{color:#374151; font-size:15px; line-height:1.7}
.muted{color:var(--muted)}
.div{height:1px;background:var(--line);margin:14px 0}

.grid2{display:grid; grid-template-columns: 1.25fr .75fr; gap:16px}
.grid3{display:grid; grid-template-columns: repeat(3, 1fr); gap:14px}

@media (max-width: 960px){
  .grid2{grid-template-columns:1fr}
  .grid3{grid-template-columns:1fr}
  .l66-burger{display:inline-block}
  .l66-nav{
    display:none;
    position:absolute;
    left:16px; right:16px;
    top:70px;
    background:#ffffff;
    border:1px solid var(--line);
    border-radius:18px;
    padding:10px;
    flex-direction:column;
    align-items:stretch;
    box-shadow: var(--shadow);
  }
  .l66-nav.open{display:flex}
  .l66-nav a{width:100%}
}

/* Badges */
.badges{display:flex; gap:10px; flex-wrap:wrap; margin-top:14px}
.badge{
  display:inline-flex; align-items:center; gap:8px;
  border:1px solid var(--line);
  background:#fff;
  border-radius:999px;
  padding:8px 12px;
  color:#4b5563;
  font-size:13px;
}
.badge b{color:var(--txt)}

/* Buttons: 主按钮用红粉渐变，副按钮白底红边（截图同款感觉） */
.btns{display:flex; gap:12px; flex-wrap:wrap; margin-top:14px}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 16px;
  border-radius:16px;
  border:1px solid rgba(249,140,127,.45);
  background: linear-gradient(90deg, var(--brandA) 0%, var(--brandB) 100%);
  color:#fff;
  font-weight:800;
  box-shadow: 0 14px 26px rgba(249,140,127,.18);
}
.btn:hover{filter:brightness(1.03)}
.btn.ghost{
  background:#ffffff;
  border:1px solid rgba(229,9,20,.30);
  color:var(--red2);
  box-shadow:none;
}
.btn.ghost:hover{
  background: rgba(249,140,127,.06);
}

/* Steps */
.step{
  display:flex; gap:12px; align-items:flex-start;
  padding:14px; border-radius:18px;
  border:1px solid var(--line);
  background:#fff;
}
.step .n{
  width:34px;height:34px;border-radius:14px;
  display:grid;place-items:center;
  background: rgba(249,140,127,.14);
  border:1px solid rgba(229,9,20,.18);
  font-weight:900;
  color: var(--red2);
}
.step h3{margin:0 0 6px;font-size:15px}
.step p{margin:0;color:var(--muted);line-height:1.7;font-size:13px}

/* FAQ */
.faq details{
  border:1px solid var(--line);
  background:#fff;
  border-radius:16px;
  padding:12px 14px;
  margin:10px 0;
}
.faq summary{cursor:pointer; font-weight:800}
.faq p{margin:10px 0 0;color:var(--muted);line-height:1.75}

/* Footer */
.l66-footer{
  border-top:1px solid var(--line);
  background:#ffffff;
}
.l66-footgrid{display:grid; grid-template-columns: 1.2fr .8fr; gap:16px; padding:22px 0}
.l66-links{display:grid; grid-template-columns: repeat(2, 1fr); gap:10px}
.l66-links a{
  color:#4b5563;
  padding:8px 10px;
  border-radius:12px;
  border:1px solid transparent
}
.l66-links a:hover{
  color:var(--txt);
  border-color:var(--line);
  background: rgba(247,248,255,.85);
}
.l66-note{color:var(--muted); line-height:1.75; margin:12px 0 0}
.l66-footbottom{
  display:flex; justify-content:space-between; gap:10px;
  padding:14px 0; border-top:1px solid var(--line);
  color:#6b7280;
}
@media (max-width: 960px){
  .l66-footgrid{grid-template-columns:1fr}
  .l66-links{grid-template-columns:1fr}
  .l66-footbottom{flex-direction:column}
}

/* KPI */
.kpi{display:grid; grid-template-columns: repeat(3, 1fr); gap:12px; margin-top:14px}
.kpi .box{
  border:1px solid var(--line);
  background:#fff;
  border-radius:18px;
  padding:14px;
  box-shadow: 0 8px 18px rgba(20,25,40,.06);
}
.kpi .box b{display:block; font-size:14px}
.kpi .box span{display:block; color:var(--muted); margin-top:6px; line-height:1.6; font-size:13px}
@media (max-width: 960px){ .kpi{grid-template-columns:1fr} }
.l66-nav a.active{
  color: var(--red2);
  border: 1px solid rgba(229,9,20,.25);
  background: rgba(249,140,127,.08);
}
.l66-logoimg{
  width:44px;
  height:44px;
  border-radius:16px;
  object-fit:cover;
  box-shadow: 0 14px 26px rgba(249,140,127,.22);
  border:1px solid rgba(255,255,255,.55);
}
@media (max-width:960px){
  .l66-logoimg{ width:38px; height:38px; border-radius:14px; }
}
/* ===== Floating Ad (bottom-right) ===== */
.l66-floatad{
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 18px;
  background: linear-gradient(90deg, var(--brandA) 0%, var(--brandB) 100%);
  box-shadow: 0 18px 45px rgba(20,25,40,.18);
  border: 1px solid rgba(255,255,255,.45);
}

.l66-floatad-link{
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
}

.l66-floatad-ico{
  width: 44px;
  height: 44px;
  border-radius: 16px;
  overflow: hidden;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.45);
  display: grid;
  place-items: center;
}
.l66-floatad-ico img{
  width: 44px;
  height: 44px;
  object-fit: cover;
}

.l66-floatad-txt b{
  display:block;
  font-size:14px;
  line-height:1.05;
  font-weight:900;
  letter-spacing:.2px;
}
.l66-floatad-txt em{
  display:block;
  margin-top:3px;
  font-style: normal;
  font-size:12px;
  opacity:.92;
}

.l66-floatad-close{
  width: 32px;
  height: 32px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.45);
  background: rgba(255,255,255,.14);
  color: #fff;
  cursor: pointer;
  font-size: 20px;
  line-height: 30px;
  padding: 0;
}
.l66-floatad-close:hover{ background: rgba(255,255,255,.22); }

/* Mobile: 不遮挡底部（如果你有底部 bar，可把 bottom 调高一些） */
@media (max-width: 960px){
  .l66-floatad{
    right: 12px;
    bottom: 12px;
    padding: 10px 12px;
    border-radius: 18px;
  }
}
.l66-footer-disclaimer {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.6;
  opacity: 0.72;
  max-width: 980px;
}

.l66-note {
  font-size: 13px;
  line-height: 1.7;
  opacity: 0.78;
}