/* 记账本 · 公开首页样式 */
:root{
  --pri:#2563eb;--pri-d:#1d4ed8;--ink:#0f172a;--sub:#64748b;--line:#e6ecf5;
  --bg:#ffffff;--soft:#f6f9ff;--red:#e11d48;--green:#16a34a;
  --shadow:0 12px 36px rgba(30,64,175,.08);--shadow-lg:0 24px 60px rgba(30,64,175,.16);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
.container{width:100%;max-width:1160px;margin:0 auto;padding:0 24px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border-radius:10px;padding:10px 20px;font-size:14px;font-weight:600;border:1px solid transparent;transition:transform .2s,box-shadow .2s,background .2s;white-space:nowrap}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(135deg,#3b82f6,#6d5cf7);color:#fff;box-shadow:0 8px 20px rgba(79,70,229,.25)}
.btn-primary:hover{box-shadow:0 12px 26px rgba(79,70,229,.35)}
.btn-ghost{color:var(--sub)}
.btn-ghost:hover{color:var(--pri)}
.btn-outline{border-color:#cbd8ee;color:var(--ink);background:#fff}
.btn-outline:hover{border-color:var(--pri);color:var(--pri)}
.btn-white{background:#fff;color:var(--pri-d);box-shadow:0 10px 30px rgba(0,0,0,.12)}
.btn-lg{padding:14px 30px;font-size:16px;border-radius:12px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(230,236,245,.9)}
.nav{height:70px;display:flex;align-items:center;gap:30px}
.logo{font-size:19px;font-weight:800;letter-spacing:.5px;display:flex;align-items:center;gap:8px}
.logo-mark{font-size:22px}
.nav-links{display:flex;gap:26px;flex:1;font-size:14px;color:#475569}
.nav-links a:hover{color:var(--pri)}
.nav-cta{display:flex;gap:8px;align-items:center}

/* Hero */
.hero{position:relative;overflow:hidden;padding:76px 0 84px;background:linear-gradient(180deg,#f7faff 0%,#fff 100%)}
.hero-glow{position:absolute;top:-260px;right:-160px;width:760px;height:760px;border-radius:50%;background:radial-gradient(circle,rgba(99,102,241,.22),rgba(59,130,246,.10) 45%,transparent 70%);pointer-events:none}
.hero-inner{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.eyebrow{display:inline-block;background:#eef2ff;color:#4f46e5;font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;margin-bottom:20px}
.hero h1{font-size:clamp(34px,4.2vw,54px);line-height:1.28;font-weight:800;letter-spacing:-.5px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#2563eb,#7c3aed);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-desc{color:#475569;font-size:16px;max-width:520px;margin:20px 0 28px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-points{list-style:none;display:flex;gap:22px;flex-wrap:wrap;margin-top:30px;color:#475569;font-size:13px}
.hero-points li{display:flex;align-items:center;gap:6px}
.hero-points i{display:inline-flex;width:18px;height:18px;border-radius:50%;background:#dcfce7;color:#16a34a;font-style:normal;font-size:11px;align-items:center;justify-content:center;font-weight:700}

/* 预览卡片 */
.hero-preview{position:relative;padding:14px}
.preview-card{background:#fff;border:1px solid #e8eef9;border-radius:20px;box-shadow:var(--shadow-lg);overflow:hidden;transform:rotate(-1.2deg);transition:transform .4s}
.hero-preview:hover .preview-card{transform:rotate(0)}
.pv-head{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;background:linear-gradient(120deg,#2563eb,#6d5cf7);color:#fff}
.pv-logo{font-weight:700;font-size:15px}
.pv-month{font-size:12px;opacity:.85}
.pv-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;padding:16px 20px;border-bottom:1px solid #f1f5f9}
.pv-summary div{display:flex;flex-direction:column;gap:2px}
.pv-summary span{font-size:11px;color:var(--sub)}
.pv-summary b{font-size:15px;font-variant-numeric:tabular-nums}
.r{color:var(--red)}.g{color:var(--green)}
.pv-list{padding:8px 20px}
.pv-item{display:flex;align-items:center;gap:12px;padding:11px 0;border-bottom:1px dashed #eef2f7}
.pv-item:last-child{border-bottom:0}
.pv-ico{width:36px;height:36px;border-radius:11px;display:flex;align-items:center;justify-content:center;font-size:17px;flex-shrink:0}
.i1{background:#fff1f2}.i2{background:#f0fdf4}.i3{background:#eff6ff}.i4{background:#faf5ff}
.pv-item>div{flex:1;min-width:0}
.pv-item b{font-size:13px;display:block}
.pv-item small{display:block;color:#94a3b8;font-size:11px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pv-item>span:last-child{font-size:13px;font-weight:700;font-variant-numeric:tabular-nums}
.pv-foot{padding:12px 20px;background:#f8faff;color:#64748b;font-size:12px;text-align:center}
.float-chip{position:absolute;background:#fff;border:1px solid #e8eef9;border-radius:12px;padding:9px 14px;font-size:12px;font-weight:600;box-shadow:var(--shadow);white-space:nowrap}
.chip-a{top:6%;right:-6%;color:var(--green)}
.chip-b{bottom:12%;left:-4%;color:var(--pri)}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.float-chip{animation:floaty 5s ease-in-out infinite}
.chip-b{animation-delay:-2.5s}

/* 数据条 */
.stats-strip{background:#0f172a;color:#fff;padding:26px 0}
.strip-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.strip-grid div{display:flex;flex-direction:column;gap:3px}
.strip-grid b{font-size:18px;background:linear-gradient(90deg,#7dd3fc,#a5b4fc);-webkit-background-clip:text;background-clip:text;color:transparent}
.strip-grid span{font-size:12px;color:#94a3b8}

/* Section 通用 */
.section{padding:86px 0}
.section-soft{background:var(--soft)}
.sec-head{text-align:center;max-width:680px;margin:0 auto 48px}
.sec-tag{display:inline-block;font-size:11px;letter-spacing:3px;color:var(--pri);font-weight:700;margin-bottom:10px}
.sec-head h2{font-size:clamp(26px,3vw,36px);font-weight:800;letter-spacing:-.5px}
.sec-head p{color:var(--sub);margin-top:12px;font-size:15px}

/* 功能卡片 */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px 24px;box-shadow:0 4px 16px rgba(30,64,175,.04);transition:transform .25s,box-shadow .25s,border-color .25s}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:#c7d7fe}
.f-ico{display:inline-flex;width:48px;height:48px;border-radius:14px;align-items:center;justify-content:center;font-size:22px;margin-bottom:16px}
.f-blue{background:#eff6ff}.f-green{background:#f0fdf4}.f-purple{background:#f5f3ff}.f-orange{background:#fff7ed}.f-pink{background:#fdf2f8}.f-cyan{background:#ecfeff}
.feature-card h3{font-size:17px;margin-bottom:8px}
.feature-card p{color:var(--sub);font-size:14px}

/* 步骤 */
.steps{display:flex;align-items:stretch;justify-content:center;gap:0}
.step{flex:1;max-width:300px;text-align:center;padding:0 18px}
.step-no{display:inline-flex;width:52px;height:52px;border-radius:16px;background:linear-gradient(135deg,#3b82f6,#6d5cf7);color:#fff;font-weight:800;font-size:18px;align-items:center;justify-content:center;box-shadow:0 10px 24px rgba(79,70,229,.25);margin-bottom:16px}
.step h3{font-size:17px;margin-bottom:8px}
.step p{color:var(--sub);font-size:14px}
.step-line{flex:0 0 60px;margin-top:26px;height:1px;background:linear-gradient(90deg,#c7d7fe,#e2e8f0)}

/* 适用人群 */
.audience{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.aud-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 20px;text-align:center}
.aud-card>span{font-size:28px}
.aud-card h3{font-size:15px;margin:10px 0 6px}
.aud-card p{color:var(--sub);font-size:13px}

/* FAQ */
.faq-wrap{max-width:820px}
.faq-list details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;padding:0 18px}
.faq-list summary{cursor:pointer;padding:16px 0;font-weight:600;font-size:15px;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:'+';color:var(--pri);font-size:20px;font-weight:400}
.faq-list details[open] summary::after{content:'−'}
.faq-list details p{color:var(--sub);font-size:14px;padding-bottom:16px}

/* CTA */
.cta{background:linear-gradient(120deg,#1d4ed8,#6d5cf7);color:#fff;text-align:center;padding:72px 0}
.cta h2{font-size:clamp(26px,3vw,36px);font-weight:800}
.cta p{opacity:.9;margin:12px 0 26px}

/* Footer */
.site-footer{background:#0f172a;color:#cbd5e1;padding:40px 0 22px}
.foot-inner{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.foot-brand{font-weight:700;font-size:17px;color:#fff;display:flex;align-items:center;gap:8px}
.foot-brand small{font-weight:400;color:#64748b;font-size:12px;margin-left:6px}
.foot-links{display:flex;gap:20px;font-size:13px}
.foot-links a:hover{color:#fff}
.foot-copy{color:#475569;font-size:12px;margin-top:24px;padding-top:18px;border-top:1px solid #1e293b}

/* 响应式 */
@media(max-width:980px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero-preview{max-width:480px;margin:0 auto;width:100%}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .audience{grid-template-columns:repeat(2,1fr)}
  .nav-links{display:none}
  .nav-cta{margin-left:auto}
}
@media(max-width:640px){
  .section{padding:60px 0}
  .hero{padding:52px 0 60px}
  .strip-grid{grid-template-columns:repeat(2,1fr);gap:18px}
  .feature-grid,.audience{grid-template-columns:1fr}
  .steps{flex-direction:column;gap:24px}
  .step-line{display:none}
  .nav-cta .btn{padding:8px 12px;font-size:13px}
  .float-chip{display:none}
  .foot-inner{flex-direction:column;text-align:center}
  .foot-links{flex-wrap:wrap;justify-content:center}
}