:root{
  --bg:#fffaf0;
  --bg-2:#fff3dc;
  --ink:#392a1d;
  --muted:#735f4e;
  --brand:#ffb84c;
  --brand-dark:#d97912;
  --peach:#ffdcc3;
  --mint:#dff6e7;
  --blue:#dcecff;
  --card:#fffdf8;
  --line:rgba(87,54,24,.13);
  --shadow:0 24px 70px rgba(108,75,39,.14);
  --radius:28px;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:linear-gradient(180deg,var(--bg) 0%,#fff 48%,#fff8ed 100%);line-height:1.7}
a{color:inherit;text-decoration:none}
p{margin:0;color:var(--muted)}
img{max-width:100%;display:block}.section{max-width:var(--max);margin:0 auto;padding:92px 24px}.section-bleed{max-width:1260px;margin:0 auto;padding:84px 24px 64px}.site-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:16px 28px;margin:0 auto;background:rgba(255,250,240,.8);backdrop-filter:blur(18px);border-bottom:1px solid rgba(87,54,24,.08)}.site-header.compact{position:sticky}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px}.brand-logo{width:40px;height:40px}.site-nav{display:flex;align-items:center;gap:22px;font-size:14px;color:#5c4635}.site-nav a{transition:.2s ease}.site-nav a:hover{color:var(--brand-dark)}.nav-cta{padding:10px 16px;border-radius:999px;background:#fff;border:1px solid var(--line);box-shadow:0 8px 24px rgba(96,63,24,.08)}.nav-toggle{display:none;border:0;background:#fff;border-radius:12px;padding:8px 10px;font-size:20px}.hero{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:48px;min-height:680px}.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:800;letter-spacing:.16em;text-transform:uppercase;color:var(--brand-dark);margin-bottom:12px}.eyebrow:before{content:"";width:9px;height:9px;border-radius:50%;background:var(--brand)}h1,h2,h3{line-height:1.18;margin:0;color:var(--ink)}h1{font-size:clamp(44px,7vw,86px);letter-spacing:-.055em;max-width:720px}h2{font-size:clamp(32px,4vw,52px);letter-spacing:-.035em}h3{font-size:22px}.hero-lead{margin-top:24px;max-width:660px;font-size:19px;color:#624e3e}.hero-actions{display:flex;gap:14px;margin:34px 0 16px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:13px 22px;border-radius:999px;font-weight:800;border:1px solid transparent;transition:.22s ease;cursor:pointer}.btn:hover{transform:translateY(-2px)}.btn.primary{background:linear-gradient(135deg,#ffb84c,#ff8d59);color:#361d0f;box-shadow:0 14px 32px rgba(215,121,18,.22)}.btn.secondary{background:#fff;border-color:var(--line);color:var(--ink);box-shadow:0 10px 28px rgba(96,63,24,.08)}.btn.ghost{border-color:rgba(88,50,11,.18);color:#6d533d;background:transparent}.microcopy{font-size:13px;color:#8a7561;max-width:620px}.phone-stage{position:relative;min-height:580px;display:flex;align-items:center;justify-content:center}.orb{position:absolute;border-radius:999px;filter:blur(.1px);opacity:.78}.orb-1{width:330px;height:330px;background:#ffd36f;right:28px;top:34px}.orb-2{width:230px;height:230px;background:#bceccf;left:40px;bottom:60px}.phone-mockup{position:relative;width:328px;border-radius:48px;padding:14px;background:#2d2119;box-shadow:0 36px 110px rgba(45,33,25,.35),inset 0 0 0 1px rgba(255,255,255,.08);transform:rotate(2deg)}.phone-top{height:24px;width:104px;border-radius:999px;background:#15100d;margin:0 auto 8px}.app-screen{min-height:560px;border-radius:36px;background:linear-gradient(180deg,#fffaf1,#fff1d8);padding:22px;overflow:hidden}.app-head{display:flex;align-items:center;justify-content:space-between;font-weight:800;font-size:14px}.pill{background:#fff;border:1px solid var(--line);border-radius:999px;padding:4px 10px}.doudou-avatar{width:86px;height:86px;border-radius:30px;background:linear-gradient(135deg,#ffcd70,#ff9e66);display:flex;align-items:center;justify-content:center;font-size:38px;font-weight:900;margin:54px auto 22px;color:#5c2e11;box-shadow:0 18px 44px rgba(255,139,56,.28)}.app-screen h3{text-align:center;margin-bottom:24px}.chat-bubble,.topic-card,.metric-card{background:#fff;border:1px solid rgba(80,45,14,.1);border-radius:22px;padding:16px;margin-bottom:14px;box-shadow:0 8px 28px rgba(96,63,24,.08);font-size:14px}.topic-card{background:#fff7e7;color:#6b4314}.metric-card{display:flex;align-items:center;justify-content:space-between}.metric-card small{display:block;color:#9a8067}.sparkline{display:flex;gap:4px;align-items:flex-end;height:44px}.sparkline span{display:block;width:8px;border-radius:99px;background:#ffb84c}.sparkline span:nth-child(1){height:20px}.sparkline span:nth-child(2){height:30px}.sparkline span:nth-child(3){height:24px}.sparkline span:nth-child(4){height:38px}.sparkline span:nth-child(5){height:34px}.trust-strip{max-width:var(--max);margin:-10px auto 20px;padding:18px 24px;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.trust-strip div{background:rgba(255,255,255,.78);border:1px solid var(--line);border-radius:22px;padding:18px 20px;box-shadow:0 8px 24px rgba(96,63,24,.06)}.trust-strip strong{display:block;font-size:13px;color:#8a6644}.trust-strip span{display:block;font-weight:800;margin-top:4px}.section-head{text-align:center;max-width:760px;margin:0 auto 46px}.section-head p{font-size:17px;margin-top:12px}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.feature-card{padding:28px;border-radius:var(--radius);background:rgba(255,255,255,.86);border:1px solid var(--line);box-shadow:0 12px 34px rgba(96,63,24,.07);transition:.22s ease}.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}.feature-card .icon{display:inline-flex;width:48px;height:48px;align-items:center;justify-content:center;border-radius:18px;background:#fff3d9;font-size:24px;margin-bottom:18px}.feature-card p{margin-top:12px}.split-section{display:grid;grid-template-columns:1fr .85fr;gap:46px;align-items:center}.split-section.reverse{grid-template-columns:.95fr 1fr}.panel{border-radius:36px;background:#fff;border:1px solid var(--line);padding:34px;box-shadow:var(--shadow)}.soft-panel{background:linear-gradient(135deg,#fff7e8,#fff)}.data-panel{background:linear-gradient(135deg,#fff,#eefaf2)}.panel h3{margin-bottom:12px}.timeline{display:grid;gap:14px;margin-top:30px}.timeline div{display:grid;grid-template-columns:52px 1fr;gap:16px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px}.timeline span{display:flex;width:42px;height:42px;align-items:center;justify-content:center;border-radius:15px;background:#ffe2a9;font-weight:900;color:#7f470e}.app-flow{padding-top:40px}.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.flow-grid div{background:#fff;border:1px solid var(--line);border-radius:26px;padding:24px;box-shadow:0 8px 26px rgba(96,63,24,.06)}.flow-grid b{display:flex;width:40px;height:40px;align-items:center;justify-content:center;border-radius:14px;background:#ffb84c;color:#4b280a;margin-bottom:16px}.flow-grid p{font-size:15px;margin-top:10px}.check-list{padding:0;margin:16px 0 0;list-style:none;display:grid;gap:10px}.check-list li{position:relative;padding-left:28px;color:#5e4a39}.check-list li:before{content:"✓";position:absolute;left:0;top:0;width:20px;height:20px;border-radius:50%;background:#dff6e7;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:900;color:#246b3b}.inline-actions{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap}.wechat-section{padding-top:20px}.wechat-card{display:flex;align-items:center;justify-content:space-between;gap:34px;border-radius:36px;padding:42px;background:linear-gradient(135deg,#32231a,#6b421e);color:#fff;box-shadow:0 30px 80px rgba(53,36,23,.25)}.wechat-card p,.wechat-card h2{color:#fff}.wechat-card .eyebrow{color:#ffd99d}.faq-section{padding-top:50px}.faq-section details{max-width:860px;margin:0 auto 12px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px 22px;box-shadow:0 8px 28px rgba(96,63,24,.05)}.faq-section summary{font-weight:900;cursor:pointer}.faq-section details p{margin-top:10px}.site-footer{max-width:var(--max);margin:40px auto 0;padding:44px 24px 54px;border-top:1px solid var(--line)}.footer-brand{display:flex;align-items:center;gap:14px;margin-bottom:22px}.footer-brand img{width:52px}.footer-brand p{font-size:14px}.footer-links{display:flex;gap:18px;flex-wrap:wrap;margin-bottom:22px}.footer-links a,.site-footer a{color:var(--brand-dark);font-weight:800}.footer-meta p{font-size:13px;color:#836d5b}.site-footer.mini{text-align:center;margin-top:20px}.doc-body{background:#fffaf0}.doc-container{max-width:880px;margin:0 auto;padding:72px 24px}.wide-doc{max-width:1060px}.doc-container h1{font-size:clamp(38px,5vw,64px);margin-bottom:10px}.doc-updated{margin:6px 0 26px;color:#7c654f}.doc-container section{padding:30px 0;border-bottom:1px solid var(--line)}.doc-container h2{font-size:28px;margin-bottom:14px}.doc-container p+ul{margin-top:14px}.doc-container li{margin:8px 0;color:#5e4a39}.notice{padding:18px 20px;border-radius:20px;background:#fff1d7;border:1px solid rgba(217,121,18,.18);color:#6f4b19}.table-wrap{overflow-x:auto;border-radius:20px;border:1px solid var(--line);background:#fff}table{width:100%;border-collapse:collapse;min-width:680px}th,td{text-align:left;padding:15px 16px;border-bottom:1px solid var(--line);vertical-align:top}th{background:#fff4dc;color:#5c3511}tr:last-child td{border-bottom:0}.submit-card{padding:28px!important;background:#fff;border:1px solid var(--line);border-radius:28px;margin:24px 0;box-shadow:0 10px 30px rgba(96,63,24,.06)}.info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:18px}.info-grid div{padding:16px;border:1px solid var(--line);border-radius:18px;background:#fffaf0}.info-grid strong{display:block;color:#8a6644;font-size:13px}.info-grid span{display:block;margin-top:4px;font-weight:800;color:#3f2c1e}.compact-grid{grid-template-columns:repeat(2,1fr)}.dev-grid div{background:#f9fcff}.caution{background:#fff8e9}.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);opacity:0;pointer-events:none;background:#2f2118;color:#fff;border-radius:999px;padding:12px 18px;box-shadow:0 14px 40px rgba(0,0,0,.2);transition:.25s ease;z-index:100}.toast.show{opacity:1;transform:translate(-50%,0)}
@media (max-width: 920px){.site-header{padding:14px 18px}.nav-toggle{display:block}.site-nav{position:absolute;top:70px;right:16px;left:16px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:16px;display:none;flex-direction:column;align-items:stretch}.site-nav.open{display:flex}.hero,.split-section,.split-section.reverse{grid-template-columns:1fr}.hero{gap:18px;min-height:auto}.phone-stage{min-height:520px}.trust-strip,.feature-grid,.flow-grid{grid-template-columns:1fr 1fr}.wechat-card{flex-direction:column;align-items:flex-start}.info-grid{grid-template-columns:1fr}}
@media (max-width: 620px){.section,.section-bleed,.doc-container{padding-left:18px;padding-right:18px}.hero{padding-top:52px}.trust-strip,.feature-grid,.flow-grid,.compact-grid{grid-template-columns:1fr}.phone-mockup{width:292px}.app-screen{min-height:500px}.footer-links{flex-direction:column;gap:8px}h1{font-size:44px}.doc-container h1{font-size:38px}.hero-actions .btn{width:100%}}